Papers - MISUMI Ryuta
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Jain, M; Shinkai, T; Anzai, K; Misumi, R
CHEMICAL ENGINEERING RESEARCH & DESIGN 216 59 - 72 2025.4
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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Operando observation of bubble formation and mass transfer overpotential in alkaline water electrolysis
MISUMI Ryuta, KURODA Yoshiyuki, ARAKI Takuto, MITSUSHIMA
JAPANESE JOURNAL OF MULTIPHASE FLOW 39 ( 1 ) 18 - 25 2025.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：THE JAPANESE SOCIETY FOR MULTIPHASE FLOW Joint Work
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Kanemoto, R; Araki, T; Misumi, R; Mitsushima, S
CHEMICAL ENGINEERING SCIENCE 304 2025.2
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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Toyama, K; Kanemoto, R; Misumi, R; Araki, T; Mitsushima, S
ELECTROCHEMISTRY 93 ( 2 ) 027011 - 027011 2025
DOI Web of Science CiNii Research
Language：English Publishing type：Research paper (scientific journal) Publisher：公益社団法人 電気化学会 Joint Work
<p>In this study, a method for detecting and tracking hydrogen and oxygen bubbles during alkaline water electrolysis was developed using Faster R-CNN and DeepSORT. The images required for CNN training were automatically generated by a pseudo-bubble image generation algorithm specifically developed for the purpose of this study. The method was applied to the results of observations on alkaline water electrolysis obtained under various current densities and wire electrode diameters. Evaluation of detection performance using a confusion matrix showed that for the hydrogen evolution reaction (HER) at a current density of 1.0 A cm<sup>−2</sup> and a wire electrode diameter of 200 µm, the method achieved a precision of 1.00, recall of 0.840, and <i>F</i><sub>1</sub> score of 0.940, indicating very high detection performance. For the oxygen evolution reaction (OER), bubbles were detected almost perfectly under all conditions, with all detection metrics exceeding 1.00. The proposed method was approximately 20000 times faster than humans. Bubble diameter distribution, total volume, total number, and Sauter mean diameter were obtained and quantitatively assessed, and the relationships between current density and electrode diameter for both HER and OER have been discussed. This method enables accurate, rapid, and automatic quantitative evaluation of visualization results from various alkaline water electrolysis observations, which were previously difficult and labor-intensive to perform manually.</p>
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Measurement Methods on Electrodes and Electrocatalysts for Water Electrolysis
MITSUSHIMA Shigenori, IOROI Tsutomu, KURODA Yoshiyuki, NAGASAWA Kensaku, UCHIYAMA Tomoki, ORIKASA Y … Show more authors
MITSUSHIMA Shigenori, IOROI Tsutomu, KURODA Yoshiyuki, NAGASAWA Kensaku, UCHIYAMA Tomoki, ORIKASA Yuki, INOUE Hiroshi, HIGUCHI Eiji, ANDO Kota, NAKAJIMA Takashi, MISUMI Ryuta, UCHIMOTO Yoshiharu Hide authors
Electrochemistry advpub ( 0 ) 2025
Language：English Publishing type：Research paper (scientific journal) Publisher：公益社団法人 電気化学会 Joint Work
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Kitajima Daisuke, Misumi Ryuta, Kuroda Yoshiyuki, Mitsushima Shigenori
Electrochimica Acta 502 2024.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier Joint Work
Alkaline water electrolysis (AWE) has attracted considerable attention in recent years as a means to produce hydrogen. However, one problem associated with AWE is the increase in overpotential at high current densities, which is attributed to bubble coverage on the electrode surface. It is therefore important to understand the bubble generation behavior to ultimately reduce the overpotential. In this study, a method was established to measure the resistance components from the electrolytic reaction and bubble coating separately based on the use of electrochemical impedance spectroscopy. The results were related to the bubble generation behavior on a Ni electrode, as observed using a high-speed camera. Consequently, a model for the degradation of the electrolytic efficiency due to bubble generation was devised, and the effect of the bubble coverage layer was quantitatively evaluated.
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Daisuke Kitajima, Ryuta Misumi, Yoshiyuki Kuroda, Shigenori Mitsushima
Electrochimica Acta 502 2024.10 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Single Work
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M.Jain, R.Misumi
Journal of Chemical Engineering of Japan 57 ( 1 ) 2024.8 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Single Work
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Kazuhiko Tsuchioka, Kazuhide Hayashi, Ryuta Misumi
HELIYON 10 ( 7 ) 2024.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Single Work
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Tsuchioka Kazuhiko, Hayashi Kazuhide, Misumi Ryuta
Heliyon 10 ( 7 ) 2024.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier Ltd. Joint Work
NixMnyCoz(OH)2 is widely used as a precursor for the cathode active material LiNixMnyCozO2 in lithium ion batteries, and the precursor size, which determines the size of the active cathode material, affects the characteristics of lithium-ion batteries. This paper proposes a method for predicting the particle size of Ni1/3Mn1/3Co1/3(OH)2 precipitated by semi-batch reaction crystallization. The distribution of supersaturated components formed in the reactor varies with the reactor scale, feed conditions of the raw material solution, and agitation conditions. Therefore, the method presented in this paper considers the effects of these conditions on particle growth. First, to identify the turbulent dispersion and concentration distribution of the supersaturated components formed in the reaction crystallizer, a computational fluid dynamics (CFD) model was constructed consisting of the governing equations of hydrodynamics and the mass balance equations of the supersaturated components considering the production by neutralization and consumption by precipitation. Next, a model of agglomeration was constructed that focused on the balance of the binding and breaking up energies for the particle pairs. The binding energy was quantified based on the bridging between particle pairs by surface deposition. The breaking up-energy was quantified based on the hydrodynamic forces when the agglomerate passes through the impeller. These models were fitted using experimental results for the final average size of the Ni1/3Mn1/3Co1/3(OH)2 secondary aggregate, which was precipitated in a small-scale stirred-tank type semi-batch reaction crystallizer. The models predicted the experimental results of the final average size in a large-scale crystallizer, with the feeding conditions of the raw material solution and stirring conditions as experimental parameters, within ±20%. The models may be used to analyze semi-batch reaction crystallization systems of NixMnyCoz(OH)2 of any composition by adjusting the model parameters according to the procedure developed in this study.
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Wilton Fogaça, Hayata Ikeda, Ryuta Misumi, Yoshiyuki Kuroda, Shigenori Mitsushima
International Journal of Hydrogen Energy 61 1274 - 1281 2024.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Single Work
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Fogaca Wilton, Ikeda Hayata, Misumi Ryuta, Kuroda Yoshiyuki, Mitsushima Shigenori
International Journal of Hydrogen Energy 61 1274 - 1281 2024.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Pergamon-Elsevier Science Ltd. Joint Work
The effects of vertical Lorentz forces generated by an external magnetic field applied perpendicular to the inherent electric field on the oxygen evolution reaction conducted on a Ni wire are investigated using cyclic voltammetry, impedance measurements, and particle image velocimetry (PIV). Both downward and upward Lorentz forces provide smaller overpotentials than that generated in their absence. Based on a dual -bubble layer model for reactant transfer, we find that the diffusion resistance of the hydroxide ions and increased ohmic resistance (after iR correction) induced by the layer of bubbles attached to the electrode surface are most effectively alleviated by the downward Lorentz force, while the charge -transfer resistance is retained. Furthermore, the generated bubbles have smaller average diameters. By using PIV measurements, we find that stronger shear stresses induced by the faster flow of the electrolyte in the vicinity of the working electrode facilitate the detachment of bubbles from the electrode surface.
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Ikeda Hayata, Misumi Ryuta, Nishiki Yoshinori, Kuroda Yoshiyuki, Mitsushima Shigenori
Electrochimica Acta 452 2023.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Pergamon-Elsevier Science Ltd. Joint Work
Alkaline water electrolysis (AWE) requires low current densities (2.0 A cm(-2), and the tertiary alcohol effect was stable over several hours. The decomposition product of TBA was not detected after electrolysis at 3.0 A cm(-2) for 10 h. We clarified that the addition of tertiary alcohols will improve the current density and productivity of the AWE system.
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Electrochimica Acta 452 2023.3 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Single Work
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A dual bubble layer model for reactant transfer resistance in alkaline water electrolysis
Ikeda Hayata, Misumi Ryuta, Nishiki Yoshinori, Kuroda Yoshiyuki, Mitsushima Shigenori
Electrochimica Acta 430 2022.8
Language：English Publishing type：Research paper (scientific journal) Publisher：Pergamon-Elsevier Science Ltd. Joint Work
Alkaline water electrolysis (AWE) can only operate efficiently at a relatively low current density of up to 0.6 A cm(-2) because bubbles cover the electrode surface at high current densities. Generally, the upper limit of current density in an electrochemical reaction is determined by the mass transfer of the reactant. Here, we propose a dual bubble layer model for the reactant transfer resistance of the oxygen evolution reaction in AWE. Using simple cylindrical nickel electrodes of different diameters, we conducted electrochemical impedance spectroscopy and microscopic observations with a high-speed video camera. The relationship between the polarization curve of the oxygen evolution reaction in AWE and the mass transfer resistance of hydroxide ions was investigated. At current densities above 0.5 A cm(-2), the bubble layer completely covered the electrode surface. This bubble layer consisted of two layers: an inner one formed by numerous primary bubbles generated on the electrode, and an outer one formed by coalesced large bubbles. The outer layer induces an additional solution resistance, R-sb. Changes in R-sb under various conditions were successfully explained by the thickness and void fraction of the bubble layer, conductivity of the solution, and tortuosity through the gap between bubbles. The inner layer resists the diffusion of hydroxide ions, and the resistance to hydroxide ion transfer through it (Rd) was modeled using the Warburg impedance element with a finite-length diffusion boundary. The charge-transfer resistance at the electrode surface (R-ct) is roughly inversely proportional to the current density. This result indicates R-ct is less sensitive to bubble coverage and almost all electrode surfaces are active in electrochemical reaction. The results showed that Rd increases with current density as much as Rct when the current density exceeds 1.0 A cm(-2). Up to a high current density of 2.5 A cm(-2), the change in polarization curve (delta E/delta i) could be quantitatively explained by the sum of the bulk solution resistance, R-s0, additional solution resistance R-sb in the gaps between large bubbles, diffusion resistance Rd in the inner bubble layer, and charge-transfer resistance R-ct at the electrode surface.
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A dual bubble layer model for reactant transfer resistance in alkaline water electrolysis
Hayata Ikeda, Ryuta Misumi, Yoshinori Nishiki, Yoshiyuki Kuroda, Shigenori Mitsushima
Electrochimica Acta 430 2022.8 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work
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Electrochemical Methods for Water Electrolysis Electrodes and Electrocatalysts
MITSUSHIMA Shigenori, IOROI Tsutomu, KURODA Yoshiyuki, NAGASAWA Kensaku, UCHIYAMA Tomoki, ORIKASA Y … Show more authors
MITSUSHIMA Shigenori, IOROI Tsutomu, KURODA Yoshiyuki, NAGASAWA Kensaku, UCHIYAMA Tomoki, ORIKASA Yuki, INOUE Hiroshi, HIGUCHI Eiji, ANDO Kota, NAKAJIMA Takashi, MISUMI Ryuta, UCHIMOTO Yoshiharu Hide authors
Denki Kagaku 90 ( 2 ) 136 - 158 2022.6
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Electrochemical Society of Japan Joint Work
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Microscopic high-speed video observation of oxygen bubble generation behavior and effects of anode electrode shape on OER performance in alkaline water electrolysis
Hayata Ikeda, Ryuta Misumi, Yudai Kojima, Ashraf Abdel Haleem, Yoshiyuki Kuroda, Shigenori Mitsushi … Show more authors
Hayata Ikeda, Ryuta Misumi, Yudai Kojima, Ashraf Abdel Haleem, Yoshiyuki Kuroda, Shigenori Mitsushima Hide authors
International Journal of Hydrogen Energy 47 ( 21 ) 11116 - 11127 2022.3 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier Joint Work
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Ikeda Hayata, Misumi Ryuta, Kojima Yudai, Haleem Ashraf Abdel, Kuroda Yoshiyuki, Mitsushima Shigeno … Show more authors
Ikeda Hayata, Misumi Ryuta, Kojima Yudai, Haleem Ashraf Abdel, Kuroda Yoshiyuki, Mitsushima Shigenori Hide authors
International Journal of Hydrogen Energy 47 ( 21 ) 11116 - 11127 2022.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Pergamon-Elsevier Science Ltd. Joint Work
An important difficulty associated with alkaline water electrolysis is the rise in anode overpotential attributable to bubble coverage of the electrode surface. For this study, a system with a high-speed video camera was developed, achieving in-situ observation of bubble generation on an electrode surface, monitoring an area of 1.02 mm(2) at 6000 frames per second. The relation between polarization curve (current density up to 3.0 A cm(-2)) and oxygen bubble generation behavior on nickel electrodes having cylindrical wires and rectangular wires of different sizes (100-300 mu m) was clarified. The generated bubbles slide upward, contacting the electrode surface and detaching at the top edge. Observations indicate that small electrodes have short bubble residence time and thin bubble covering layer on the electrode. As a result, the small electrode diameter contributes to smaller overpotential at high current density. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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TERADA Jun, MISUMI Ryuta, KAMINOYAMA Meguru, NISHI Kazuhiko
Bulletin of the Society of Sea Water Science, Japan 74 ( 1 ) 44 - 49 2020.2 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：The Society of Sea Water Science, Japan Joint Work
This study examines a method for elucidating the relation between the size distribution of crystals and the local supersaturation distribution obtained from simulation. To apply simulation results to equipment design and process control, one must understand relations prevailing among the distribution of physical quantities, nucleation, and crystal growth. Simulation results obtained for KCl–ethanol anti-solvent crystallization in a Y-shaped channel are used as an example. The trajectory on which crystals move in the channel is specifically examined. The concentrations of the solute and of the anti-solvent on the trajectory are drawn on a ternary phase diagram. The crystal size distribution is indicated as explainable quantitatively from the solute and the anti-solvent concentration and local supersaturation change on the trajectory which are drawn on the ternary phase diagram. Appropriate equipment design and process control conditions might be obtainable from the supersaturation changes on the crystal trajectory obtained using this method.
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「しょっぱいはなし」
三角 隆太
日本海水学会誌 74 ( 2 ) 118 - 118 2020
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本海水学会 Single Work
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Method Coupling Computational Fluid Dynamics with Ternary Phase Diagram for Anti-solvent Crystallization
Jun TERADA, Ryuta MISUMI, Meguru KAMINOYAMA and Kazuhiko NISHI
Bull. Soc. Sea Water Sci., Jpn. 73 314 - 321 2019.12 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：日本海水学会 Joint Work
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Lagrangian simulation of particle properties and stirring condition effects on solid particle distributions in stirred tanks with different size
Imai, S., M. Kuroda, R. Misumi, M. Kaminoyama,
Proc. of 12th European Congress of Chemical Engineering (ECCE12) 696 - 697 2019.9
Language：English Publishing type：Research paper (international conference proceedings) Publisher：European Congress of Chemical Engineering Joint Work
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Computational fluid dynamics analysis of 3D flow patterns in a stirring blade turning space in a wide range of Reynolds number
Hakamada, T., R. Misumi, M. Kaminoyama,
Proc. of 12th European Congress of Chemical Engineering (ECCE12) 574 - 575 2019.9
Language：English Publishing type：Research paper (international conference proceedings) Publisher：European Congress of Chemical Engineering Joint Work
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Simulation of Fluidity, Dispersion and Mass Transfer in an Annular Centrifugal Contactor
Sano Yuichi, Sakamoto Atsushi, Takeuchi Masayuki, Misumi Ryuta, Kunii Kanako, Todoroki Kei, Nishi K … Show more authors
Sano Yuichi, Sakamoto Atsushi, Takeuchi Masayuki, Misumi Ryuta, Kunii Kanako, Todoroki Kei, Nishi Kazuhiko, Kaminoyama Meguru Hide authors
KAGAKU KOGAKU RONBUNSHU 44 ( 6 ) 335 - 340 2018.11 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Chemical Engineers, Japan Joint Work
<p>To improve the performance of an annular centrifugal contactor with high throughput and separation performance, the effect of operating conditions on fluidic and dispersion behavior was investigated by computational fluid dynamics (CFD) analysis based on the turbulence model, and the calculated results were validated by experimental data. The liquid phase in the annular zone was gradually divided into two regions vertically with increasing rotor speed and decreasing flow rate, and a liquid flow toward the center of the housing bottom was generated in the lower annular zone under all operating conditions. The droplet size of the dispersed phase in the annular zone decreased with increasing rotor speed and decreasing flow rate. These calculated results showed good agreement with the experimental data. CFD analysis taking into account mass transfer between aqueous and organic phases was also attempted, and it was confirmed that the change in extraction performance with rotor speed showed the same tendency as the experimental result.</p>
Other Link： https://ci.nii.ac.jp/naid/130007519881
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Starting Torque of Several Impellers
Nishi, K., S. Watanabe, Y. Kudo, Y. Bando, R. Misumi, M. Kaminoyama,
Proc. of 16th European Conference on Mixing (ECOM16) ( 117 ) 2018.9
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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PIV Measurements of Fluid Velocity Distribution in a Turning Radius of Impeller Blades in Transition Regime
Misumi, R., T. Hakamada, H. Tanabe, M. Kaminoyama
Proc. of 16th European Conference on Mixing (ECOM16) ( 118 ) 2018.9
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Quantification of the Concentration Distribution of a Highly Concentrated Dispersion Phase in a Liquid-Liquid Stirred Vessel using Image Analysis
Kaminoyama, M., R. Misumi, K. Sugiyama
Proc. of 16th European Conference on Mixing (ECOM16) ( 162 ) 2018.9
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Flow Behavior in Annular Centrifugal Extractors with Different Vessel Sizes
44 ( 5 ) 285 - 291 2018.9 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
Other Link： https://www.jstage.jst.go.jp/article/kakoronbunshu/44/5/44_18wh006/_article/-char/en
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ASAHINA Eri, MIYAUCHI Shota, MISUMI Ryuta, KAMINOYAMA Meguru
Bulletin of the Society of Sea Water Science, Japan 72 ( 4 ) 237 - 244 2018.5 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Sea Water Science, Japan Joint Work
In a stirred-type crystallizer, stirring operations often cause crystal particle abrasion after particle collision with the impeller blade while producing numerous attrition fragments. Therefore, controlling the total number of crystal particles requires evaluation of the quantitative effects of stirring conditions as well as crystal material properties on attrition fragment generation. For this study, using potassium sulfate and potassium alum as model crystals, we measured the time evolution of the total number of crystal attrition fragments and the abraded ratio of parent crystals under various stirring conditions in a stirred vessel filled with silicone oil. Results show that the attrition fragment generation rate of potassium sulfate is higher than that of potassium alum when compared under the same abraded ratio of parent crystal and the same stirring conditions. The fragment generation rate of potassium sulfate decreases gently when the abraded ratio increases: the attrition fragments from potassium sulfate are generated easily; they continue to be generated longer than those from potassium alum. The generation rate of attrition fragments measured for rounded crystals was compared with Gahn and Mersmann's attrition model for a single crystal with sharp cones considering the effects of crystal material properties. Both experimental and model estimated values showed qualitative agreement from the perspective of material properties.
Other Link： https://ci.nii.ac.jp/naid/130007708810
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Misumi Ryuta, Miyauchi Shota, Kato Konatsu, Asahina Eri, Nishi Kazuhiko, Kaminoyama Meguru
KAGAKU KOGAKU RONBUNSHU 44 ( 3 ) 147 - 152 2018.5 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Chemical Engineers, Japan Joint Work
<p>Stirring operations in a crystallizer often induce particle abrasion caused by particle–impeller collision, resulting in numerous attrition fragments. This study developed a method for measuring the size and total number of attrition crystal fragments in a stirred vessel filled with anti-solvent, using potassium alum as the model crystal based on image-processing algorithms of SEM images of attrition fragments. The abraded volume ratio of a parent crystal was also evaluated, based on the edge length of the regular octahedron of a single potassium alum crystal. Results showed that both the number of attrition fragments and the abraded volume of parent crystals initially increased rapidly and reached saturation after about 40 h. The conical parent crystal became rounded with stirring time, although its flat surfaces did not change to any great degree. The rate of attrition fragment generation, which is correlated with the abraded ratio of the parent crystal, decreased rapidly to a few tenths as the parent crystal became rounded.</p>
Other Link： https://ci.nii.ac.jp/naid/130006742936
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Rotor Speed and Supply Flow Rate Effects on Flow Behavior in an Annular Centrifugal Extractor
Misumi Ryuta, Kunii Kanako, Todoroki Kei, Nishi Kazuhiko, Kaminoyama Meguru, Sano Yuichi, Sakamoto … Show more authors
Misumi Ryuta, Kunii Kanako, Todoroki Kei, Nishi Kazuhiko, Kaminoyama Meguru, Sano Yuichi, Sakamoto Atsushi, Takeuchi Masayuki Hide authors
KAGAKU KOGAKU RONBUNSHU 44 ( 3 ) 135 - 141 2018.5 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Chemical Engineers, Japan Joint Work
<p>Annular centrifugal extractors have been used in spent nuclear fuel reprocessing, but the relation between the extraction rate and flow pattern in the vessel remains unclear. This study quantifies characteristics of the flow pattern to clarify this relation. An extractor produces a mixing zone around the vessel bottom and a separation zone in the rotor. The horizontal velocity of the liquid in the mixing zone was measured using particle image velocimetry at various rotor speeds and supply flow rates.</p><p>Flow behavior in the mixing zone is of three types, depending on operational conditions: Type A, Type B, and a transition regime. At lower rotor speeds and high supply flow rates, the mixing zone is fully filled with liquid from the vessel bottom up to the lower edge of the rotor: the Type A flow state. At high rotor speeds and low supply flow rates, the zone with liquid present is vertically divisible into two regions: near the vanes and around the bottom of the rotor, which is the Type B flow state. A transition regime is also observed between Type A and Type B states. In each region surrounding the two vanes on the vessel bottom and the vessel wall, the liquid flowed in the direction of rotor rotation along the vessel wall. Liquid flow altered by the vane flowed toward the center of the vessel bottom. The liquid then entered the separation zone through the orifice at the rotor bottom. For the Type A state, the horizontal velocity distribution was roughly proportional to the rotor speed. For the Type B state, the horizontal velocities around the vessel bottom were lower than those of Type A and were not proportional to the rotor speed. Presumably, the liquid fed into the vessel went directly to the rotor instead of passing between the two vanes attached to the vessel bottom.</p>
Other Link： https://ci.nii.ac.jp/naid/130006742977
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Investigation of Torque and Horizontal Load on a Paddle Impeller in Eccentric Mixing
Tanabe, Hitoshi Misumi, Ryuta Kaminoyama, Meguru Nishi, Kazuhiko
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 51 ( 3 ) 197 - 202 2018.3 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
Other Link： https://www.jstage.jst.go.jp/article/jcej/51/3/51_17we016/_article
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Starting Torque of Vertical Paddle Impellers
Nishi, Kazuhiko Bando, Yuma Misumi, Ryuta Kaminoyama, Meguru
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 50 ( 9 ) 677 - 683 2017.9 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
Other Link： https://www.jstage.jst.go.jp/article/jcej/50/9/50_16we353/_article
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Quantification of dispersion phase concentration distribution in high concentration liquid-liquid stirred tank using image analysis
Sugiyama, K., R. Misumi and M. Kaminoyama
The 11th International Conference on Separation Science and Technology (ICSST17) FP_11 2017
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Evaluation by image analysis of time evolution of the crystal particle aggregation state during batch cooling crystallization
Hayashi, H., R. Misumi, M. Kaminoyama, K. Nishi and B. Harjo
International Symposium on Mixing in Industrial Processes 9 (ISMIP9) 2017
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Quantification by image analysis of mixing of two fluids with large viscosity ratio in static mixers having elements of two types
Fujiwara, M., R. Misumi, M. Kaminoyama, K. Taniguchi, Y. Katai and K. Nish
International Symposium on Mixing in Industrial Processes IX (ISMIP9) 12 2017
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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PIV measurements of discharge flow velocity distributions ahead of and behind rotating blades in stirred tanks
Arai, K., H. Tanabe, R. Misumi and M. Kaminoyama
10th World Congress of Chemical Engineering (WCCE10 2599 2017
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Crystal material influence on fragment generation and parent crystal abrasion caused by crystal particle collisions with impeller blades
Asahina, E., S. Miyauchi, R. Misumi and M. Kaminoyama
he 11th International Conference on Separation Science and Technology (ICSST17) CO - 05 2017
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Operational condition effects on flow behaviour and drop size distributions in the mixing zone of an annular centrifugal contactor
Okamoto, S., R. Misumi, M. Kaminoyama, Y. Sano, A. Sakamoto, M. Watanabe and K. Koizumi
The 11th International Conference on Separation Science and Technology (ICSST17) FO - 03 2017
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Kazuhiko Nishi, Kazufumi Sonoda, Ryuta Misumi, Meguru Kaminoyama
49 ( 12 ) 973 - 978 2016.12 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
Other Link： https://www.jstage.jst.go.jp/article/jcej/49/12/49_13we110/_article
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Resolution enhancement of electrical resistance tomography by iterative back projection method
Ichijo, N., S. Matsuno, T. Sakai, Y. Tochigi, M. Kaminoyama, K. Nishi, R. Misumi, S. Nishiyama
Journal of Visualization 19 ( 2 ) 183 - 192 2016.5 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER Joint Work
An iterative back projection method (i-BP) has been developed to improve the resolution of reconstructed images produced by electrical resistance tomography (ERT). This solution is based on an iterative calculation of the electrical fields and it is possible to reconstruct clearer images than those reconstructed by the conventional back projection method without divergence. However, it does take several minutes to finish the iteration process, and therefore this solution can be applied to flow fields that require high spatial resolution rather than short processing times, such as the accumulation of noble metals in glass melters. Numerical simulations and experiments using a simple model are performed in this study. The numerical simulations show that clear images are reconstructed both near the wall and at the center by i-BP. The conductivity correlation coefficient between the genuine distribution and the reconstructed image is improved from 0.4 to 0.9. The validity of the i-BP method is also confirmed by the experimental results. As a result, it is confirmed that ERT and i-BP are capable of reconstructing acceptable images and have potential for use in the visualization of the accumulation of noble metals in a glass melter.
Other Link： http://link.springer.com/article/10.1007%2Fs12650-015-0308-8
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Masaoka, K., N. Yoshikawa, M. Hasegawa, R. Misumi, K. Nishi and M. Kaminoyama
J. Chem. Eng. Japan 49 ( 1 ) 42 - 47 2016.1 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
Other Link： https://www.jstage.jst.go.jp/article/jcej/49/1/49_15we041/_article
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Investigation of Torque and Horizontal Load on a Paddle Impeller in Eccentric Mixing
Tanabe, H., K. Nishi, R. Misumi and M. Kaminoyama
5th Asian Conference on Mixing (ACOM2016) 40 - 44 2016
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Effect of double stage paddle impeller setting conditions on the structure of the streak lobe in laminar mixing vessel
Hayashi, M., K. Nishi, R. Misumi and M. Kaminoyama
APCChE 2015 Congress incorporating Chemeca 2015 3126369 2015
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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High-Speed Video Camera System Synchronized with Impeller Rotation For Direct Measurement of Particle Collisions with Impeller Blade
Tomura, S., R. Misumi, K. Nishi and M. Kaminoyama
15th European Conference on Mixing 339 - 344 2015
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Effects of Particle Property on Particle Collision with Impeller Blade
Misumi, R., H. Iijima, S. Tomura, K. Nishi and M. Kaminoyama
15th European Conference on Mixing 240 - 245 2015
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Measurement Method of Size and Total Number of Attrition Crystal Fragments in Anti-Solvent Caused by Crystal Particle Collisions with Impeller Blade
Misumi, R., K. Kato, T. Higashiguchi, K. Nishi and M. Kaminoyama
International Workshop on Industrial Crystallization (BIWIC2015) 265 - 274 2015
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Starting torque and flow dynamics of vertical paddle impellers
Nishi, K., Y. Bando, R. Misumi and M. Kaminoyama
APCChE 2015 Congress incorporating Chemeca 3126368 2015
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Effects of Impeller Type on Mixing Performance in Continuous Laminar Flow
Suzuki, Y., R. Misumi, K. Nishi, M. Kaminoyama
J. Chem. Eng. Japan 47 ( 11 ) 805 - 814 2014.11 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
Along with the sophistication of required optical performance for glass products, the improvement of molten glass homogeneity has become much more important these days. Under various restrictions, mechanical mixing with impellers plays a significant role in achieving high quality and productivity. However, the mixing in continuous laminar flow such as an industrial glass manufacturing process is less understood. Under this circumstance, an improvement in the mixing technology in glass industries heavily depends on seat-of-the-pants approaches. The purpose of this study is to clarify the effects of impeller type on the mixing performance in continuous laminar flow by a newly defined evaluation index calculated from concentration measurements of injected electrolyte tracer with three types of impeller under various impeller speeds. The calculated mixing performance evaluation index could not be solely dependant on the input power, which showed increasing impeller speed or power input did not always improve mixing in the channel in the case of inappropriate flow patterns. Results in this study showed the importance of flow pattern optimization in the continuous laminar flow to enable an improvement in overall mixing in the channel in a limited residence time of an object substance.
Other Link： https://www.jstage.jst.go.jp/article/jcej/47/11/47_13we245/_article
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MASAOKA Koji,MISUMI Ryuta,NISHI Kazuhiko,KAMINOYAMA Meguru
Journal of the Society of Sea Water Science,Japan 68 ( 4 ) 251 - 257 2014.8 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Sea Water Science, Japan Joint Work
Other Link： https://www.jstage.jst.go.jp/article/swsj/68/4/68_251/_article/-char/ja/
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Mixing Performance Evaluation in Continuous Laminar Flow
Suzuki, Y., R. Misumi, K. Nishi, M. Kaminoyama
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 47 ( 5 ) 363 - 372 2014.5 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
Mechanical mixing with an impeller in continuous laminar flow is sometimes introduced to industrial processes. In glass producing industries, especially, mechanical mixing has a significant role in homogenising continuously flowing molten glass at high temperature and achieving high quality glass. Nevertheless, the mixing performance evaluation in a continuous flow system, especially incomplete mixed flow, has not been well studied. It is necessary to enable quantitative evaluation of mixing to enhance the development of new mixing technology in this field. In the present study, concentration distribution measurements of an injected tracer in continuous laminar flow were performed in the downstream area of an impeller to investigate the influences of the impeller speed and setting position. An evaluation method with the standard deviation calculated from the measured concentration of 15 electrodes in a channel showed good agreement with the visualization method and the effect of impeller speed and position on mixing could be quantitatively evaluated.
Other Link： https://www.jstage.jst.go.jp/article/jcej/47/5/47_13we033/_article
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Power Consumption and Mixing Performance of an Eccentrically Located Maxblend Impeller
K. Nishi, N. Enya, R. Misumi, M. Kaminoyama
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 47 ( 2 ) 146 - 150 2014.2 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
The high-level performance of a large impeller can be combined with the advantages of an eccentric impeller by using the impeller at an eccentric position. In this study, the power consumption and mixing time for Maxblend, which is a type of large impeller, were investigated. The power consumption P and mixing time theta(M) were measured under various eccentric conditions. The relationships between the power number (Np) and Reynolds number (Re) and between the dimensionless mixing time (n theta(M)) and Re were investigated. It was confirmed that a large amount of energy can be supplied to the mixing liquid in eccentric mixing based on the Np-Re curves. In the laminar state, the value of n theta(M) of eccentric mixing under suitable eccentric conditions was lower than that of concentric mixing with and without baffles. In this region, eccentric mixing was useful in terms of power consumption. On the other hand, the mixing effciency based on the power consumption at L-E = 0.04 m was almost the same as that of concentric mixing with baffles in the turbulent state, where Re > 2500.
Other Link： https://www.jstage.jst.go.jp/article/jcej/47/2/47_13we109/_article
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Masaoka, K., R. Misumi, K. Nishi, M. Kaminoyama
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 47 ( 1 ) 78 - 84 2014.1 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
To develop a new industrial crystallization operation or crystallizer capable of realizing a higher crystal growth rate, a method of enhancing apparent crystal growth through the use of fine-crystal adhesion was examined using a classified bed-type crystallizer. We were able to clarify the effects of incorporating a pump for applying shear stress to a supersaturated mother solution along the path between the supersaturating section and the crystal growth section of the apparatus. A fine-generator pump was found to be effective at creating a discharge flow from the path, stimulating nucleation by impeller-based agitation, and recycling the solution back into the path. We found that the number of fine crystals could not be increased significantly with crystallization in a normal classified bed-type crystallizer that excludes the use of a fine-generator pump, whereas these parameters were controllable using the fine-generator pump. As an indicator of the output of the fine-generator pump, we defined the agitation rate m(3)/m(3), which is expressed as the ratio of the flow rates between the fine-generator pump and the circulation pump. The fine-generator pump is effective at enhancing crystal growth rates at agitation rates of less than 1 m(3)/m(3) and at an operational degree of saturation of less than 1.4 g/L. The most effective agitation rate was found to be 0.5 m(3)/m(3), and it was independent of the degree of saturation. The maximum crystal growth rate was found to be 160 mu m/h at a degree of saturation of 1.4 g/L, which was about three times greater than the maximum crystal growth rate without the use of the fine generator. These results are effective for the actual method of enhancing apparent crystal growth, although elucidation of the mechanism based on the phenomenological model is necessary.
Other Link： https://www.jstage.jst.go.jp/article/jcej/47/1/47_13we168/_article
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Mechanism of Mixing Enhancement of a Yield Stress Fluid in a Stirred Vessel with Aeration
Kaminoyama, M., S. Ikeda, H. Nakahara, R. Misumi and K. Nishi,
Indo-Japanese Symposium "Separation Technology for Green Environment", in 67th Annual Session of the Indian Institute of Chemical Engineers (CHEMCON 2014) 2014
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Effects of Impeller Height and Particle Properties on the Particle Collision Phenomena in a Solid-liquid Stirred Vessel
Iijima, H., R. Misumi, K. Nishi and M. Kaminoyama
International Symposium on Mixing in Industrial Processes 8 (ISMIP8) 43 - 44 2014
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Relation between Particle Collisions and Paint Erosion on Impeller Blades
Misumi, R., H. Kato, H. Iijima, K. Nishi and M. Kaminoyama
International Symposium on Mixing in Industrial Processes 8 (ISMIP8) 62 - 63 2014
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Study of the Starting Torque of Vertical Paddle Impellers
Banda, Y., K. Nishi, R. Misumi and M. Kaminoyama
International Symposium on Mixing in Industrial Processes 8 (ISMIP8) 24 - 25 2014
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Horizontal Load on Agitating Shaft of Eccentric Mixing using Maxblend Impeller
Nishi, K., K. Sonoda, R. Misumi and M. Kaminoyama
International Symposium on Mixing in Industrial Processes 8 (ISMIP8) 65 - 66 2014
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Effects of Agitation and Fluid Concentration on the Mixing Enhancement of a Yield Stress Fluid in a Stirred Vessel with Aeration
Kaminoyama, M., H. Nakahara, S. Ikeda, R. Misumi and K. Nishi
International Symposium on Mixing in Industrial Processes 8 (ISMIP8) 49 2014
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Applicability of ERT to the glass melter with fewer electrodes
Ichijo, N., S. Matsuno, T. Sakai, Y. Tochigi, M. Kaminoyama, K. Nishi, R. Misumi and S. Nishiyama
5th Internatinal Workshop on Process Tomography (IWPT5) 42 2014
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Effect of Feed Location on Particle Size Distribution in Production of Crystals in a Classified Bed Crystallizer
Masaoka, K., N. Yoshikawa, M. Hasegawa, R. Misumi, K. Nishi and M. Kaminoyama
19th International Symposium on Industrial Crystallization (ISIC19 146 2014
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Kanaya, K., Akao, S., R. Misumi, K. Nishi, M. Kaminoyama
CHEMICAL ENGINEERING RESEARCH & DESIGN 91 ( 11 ) 2098 - 2105 2013.11 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：INST CHEMICAL ENGINEERS Joint Work
A new method for preparing functional O/W microcapsules using a process involving O/W/O emulsion as particle formation was developed. Coenzyme Q10 (CoQ10) or reduced coenzyme Q10 (QH) was used as the core substance. QH oxidized fast when exposed to air. O/W microcapsules were manufactured by conventional liquid phase drying method (LPD). The purpose of this study is to develop a simple method of estimating drop diameter which is possible to evaluate immediately the mean drop diameter during the microencapsulation process without the usual photographic measurement. This developed estimation is possible to predict a Sauter mean diameter by measuring the amount of inner CoQ10 released from O/W emulsion droplet. The amount of inner oil phase released from O/W emulsion has correlation with increased total surface area of O/W emulsion droplet caused by breaking droplet. Released rate of CoQ10 from O/W emulsion droplet to outer continuous phase under different rotational speed and emulsion viscosity was measured with an absorption spectrometer. As a result of the changes of released inner CoQ10 amount, droplet breakage under low emulsion viscosity was promoted by agitation speed. It is concluded that droplet dispersion state during manufacturing of O/W microcapsules was evaluated well by applying the developed estimation method. (C) 2013 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Other Link： http://www.sciencedirect.com/science/article/pii/S0263876213002840
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MIYAMOTO Tetsuo,INAGAKI Koji,NISHI Kazuhiko,MISUMI Ryuta,KAMINOYAMA Meguru
Journal of the ociety of Chemical Engineers, Japan 39 ( 5 ) 413 - 419 2013.9 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Chemical Engineers, Japan Joint Work
Other Link： https://www.jstage.jst.go.jp/article/kakoronbunshu/39/5/39_13wh025/_article/-char/ja/
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A Study of the Effects on Cooling Rate of Impeller Shape with the Aim of Scaling up a Cream Cooling Storage Tank
T. Miyamoto, H. Shidara, K. Inagaki, K. Nishi, R. Misumi, M. Kaminoyama
J. Chem. Eng. Japan 46 ( 3 ) 181 - 186 2013.3 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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Torque and Horizontal Load on an Agitating Shaft in an Eccentric Mixer with a Maxblend Impeller
Nishi, K., K. Sonoda, R. Misumi and M. Kaminoyama
Forth Asian Conference on Mixing 13 - 18 2013
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Lagrangian Simulation of Detailed Particle Motion around Impeller and Bottom in a Stirred Vessel
Misumi, R., K. Nishi and M. Kaminoyama
2013 Taiwan-Japan Joint Symposium on Mixing Technology 1 - 2 2013
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Fluidic Analysis in an Annular Centrifugal Contactor for Fuel Reprocessing", International Conference on Fast Reactors and Related Fuel Cycles
Sano, Y., A. Sakamoto, H. Ogino, H. Hirano, K. Todoroki, R. Misumi, K. Nishi and M. Kaminoyama
Safe Technologies and Sustainable Scenarios 199 - 251 2013
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Applicability of ERT to the Rectangular Section Glass Melter
Ichijo, N., S. Matsuno, T. Sakai, Y. Tochigi, M. Kaminoyama, K. Nishi and R. Misumi
7th World Congress on Industrial Process Tomography (WCIPT7) 1 - 3 2013
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Quantification of Particle Collision on Impeller Blades in a Stirred Vessel
Misumi, R., K. H., K. Nishi and M. Kaminoyama
4th Asian Conference on Mixing (ACOM2013) 201 - 204 2013
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Development of novel drop diameter measuring method in the manufacturing process of functional O/W microcapsules
Kanaya, K., S. Akao, R. Misumi, K. Nishi and M. Kaminoyama
14th European Conference on Mixing 193 - 198 2012.9
Language：English Publishing type：Research paper (scientific journal) Joint Work
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Relation between particle rising behavior and liquid flow around the bottom of a stirred vessel
Misumi, R., T. Sasaki, H. Kato, K. Nishi and M. Kaminoyama
14th European Conference on Mixing 299 - 304 2012.9
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Power Consumption and Mixing Performance of an Eccentrically Located MAXDLEND Impeller
Nishi, K., N. Enya, R. Misumi and M. Kaminoyama
International Workshop on Process Intensification 2012 (IWPI 2012) 21 - 22 2012
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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A Study of the Effects on Cooling Rate of Impeller Shape with the Aim of Scaling Up a Cream Cooling Storage Tank
Miyamoto, T., H. Shidara, K. Inagaki, K. Nishi, R. Misumi and M. Kaminoyama
International Workshop on Process Intensification 2012 (IWPI 2012) 82 2012
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Online Measuring Method of O/W Emulsion Drop Diameter Based on Released Inner Oil Amount
Kanaya, K., R. Misumi, K. Nishi and M. Kaminoyama
International Workshop on Process Intensification 2012 (IWPI 2012) 84 2012
Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Development of Non-Intrusive Measurement Method for Primary Nucleation Phenomena in a Stirred Vessel Based on Laser Light Scattering
Ryuta Misumi, Taiki Yamada, Shimpei Kato, Kazuhiko Nishi, Meguru Kaminoyama
J. Chem. Eng. Japan 44 ( 11 ) 888 - 894 2011.11 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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Mixing in Eccentrically Located Hi-F Mixer
Nishi, K., N. Enya, Y. Tanaka, R. Misumi, M. Kaminoyama
J. Chem. Eng. Japan 44 ( 11 ) 859 - 867 2011.11 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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A Method for Determining the Representative Apparent Viscosity of Highly Viscous Pseudoplastic Liquids in a Stirred Vessel by Numerical Simulation
M. Kaminoyama, K. Nishi, R. Misumi, F. Otani
J. Chem. Eng. Japan 44 ( 11 ) 868 - 875 2011.11 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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Flow and Diffusion Behavior as a Function of Viscosity in a Double-Y-Type Microfluidic Device
K. Nishi, J. M. Perera, R. Misumi, M. Kaminoyama, G. W. Stevens
J. Chem. Eng. Japan 44 ( 7 ) 509 - 517 2011.7 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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Highly Efficient Evaporative Crystallization of a High Suspension Density Sodium Chloride Slurry in a Draft-Tube Stirred Vessel in Continuous Operation
Ryuta Misumi, Shimpei Kato, Suisei Ibe, Kazuhiko Nishi and Meguru Kaminoyama
J. Chem. Eng. Japan 44 ( 4 ) 240 - 246 2011.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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Optimal Seeding Conditions for Semi-Batch Type Evaporative Crystallization of a High Suspension Density Sodium Chloride Slurry in a Draft-Tube Stirred Vessel
Ryuta Misumi, Toshiharu Toyoda, Ryuta Katayama, Kazuhiko Nishi and Meguru Kaminoyama
J. Chem. Eng. Japan 44 ( 4 ) 233 - 239 2011.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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Scale-Up Factor for Mean Drop Diameter in Batch Rotor-Stator Mixers with Internal Circulation
T. Kamiya, T. Sugawara, H. Sasaki, T. Tomita, M. Kaminoyama, K. Nishi, R. Misumi
J. Chem. Eng. Japan 43 ( 9 ) 737 - 744 2010.9 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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Evaluation Method of Homogenization Effect for Different Stator Configurations of Internally Circulated Batch Rotor-Stator Mixers
T. Kamiya, H. Sasaki, Y. Toyama, K. Hanyu, M. Kaminoyama, K. Nishi, R. Misumi
J. Chem. Eng. Japan 43 ( 4 ) 355 - 362 2010.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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Scale-Up Factor for Mean Drop Diameter in Batch Rotor-Stator Mixers
Kamiya, T., M. Kaminoyama, K. Nishi, R. Misumi
J. Chem. Eng. Japan 43 ( 4 ) 326 - 332 2010.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAP Joint Work
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Study of Diffusion of Co(II) and Co(II) - DEHPA complex in a Microfluidic Device
Nishi, K., J. M. Perera, R. Misumi, M. Kaminoyama, G. W. Stevens
J. Chem. Eng. Japan 43 ( 4 ) 342 - 348 2010.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAP Joint Work
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Measurements of the Phase Inversion Phenomenon in a Suspension Polymerization Reactor with an Electrical Resistance Tomography System
Kaminoyama, M., K. Kato, R. Misumi, K. Nishi
J. Chem. Eng. Japan 43 ( 1 ) 52 - 55 2010.1 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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HARADA Yoshinao,KAMINOYAMA Meguru,NISHI Kazuhiko,MISUMI Ryuta,SUNADA Kiyoshi,MASHIKO Yoshihiro
Report of Japan Society of Chemical Engineers 35 ( 4 ) 351 - 356 2009.4 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Chemical Engineers, Japan Joint Work
Other Link： https://www.jstage.jst.go.jp/article/kakoronbunshu/35/4/35_4_351/_article/-char/ja/
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Influence of Mixing Conditions on Properties of Powder Composed of a Polymer Prepared by 2,3-Dichloro-1,3-Butadiene Suspension Polymerization
Harada, Y., K. Sunada, Y. Mashiko, M. Kaminoyama, K. Nishi, R. Misumi
Journal of Chemical Engineering of Japan 42 ( 1 ) 1 - 5 2009.1 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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Ryuta Misumi, Makoto Tsukada, Kazuhiko Nishi and Meguru Kaminoyama
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 41 ( 10 ) 939 - 946 2008.10 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
Other Link： http://www.jstage.jst.go.jp/article/jcej/41/10/41_939/_article
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Numerical Analysis of the Mixing Process for a Heterogeneously Viscous System of High Concentration Slurry Liquids in a Stirred Vessel
Meguru KAMINOYAMA, Kazuhiko NISHI, Ryuta MISUMI, Tomoyuki INOUE, Hiroshi TAKEDA
Journal of Chemical Engineering of Japan 40 ( 8 ) 645 - 651 2007.8 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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Correlation of the Mixing Process and the Power Consumption of Double-blade Kneaders
K.Nishi, K.Matsuda, Y.Suzuki, R.Misumi, M.Kamiwano, M.Kaminoyama
Journal of Chemical Engineering of Japan 40 ( 8 ) 658 - 665 2007.8 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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KAMINOYAMA Meguru,NISHI Kazuhiko,MISUMI Ryuta
Bull. Soc. Sea Water Sci., Jpn. 61 ( 1 ) 9 - 16 2007.2 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Society of Japan Sea Water Sciences Joint Work
Other Link： https://www.jstage.jst.go.jp/article/swsj1965/61/1/61_9/_article/-char/ja/
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Power Consumption of Double-Bladed Kneaders of Various Shapes
K.Nishi, K.Matsuda, Y.Suzuki, M.Kamiwano, M.Kaminoyama
Journal of Chemical Engineering of Japan 39 ( 10 ) 1041 - 1049 2006.10 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
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K. Nishi, M. Kaminoyama, M. Kamiwano
Bull. Soc. Sea Water Sci., Jpn. 60 ( 5 ) 365 - 378 2006.10 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：Society of Japan Sea Water Sciences Joint Work
Other Link： https://www.jstage.jst.go.jp/article/swsj1965/60/5/60_365/_article/-char/ja/
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Monitoring Stability of Reaction and Dispersion States in a Suspension Polymerization Reactor using Electrical Resistance Tomography Measurements
M.Kaminoyama, S.Taguchi, K.Nishi,R.Misumi
Chemical Engineering Science 60 ( 20 ) 5513 - 5518 2005.10 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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Radical Polymerization in Supercritical Carbon Dioxide - Use of Supercritical Carbon Dioxide as a Mixing Assistant -
K.Nishi, Y.Morikawa, M.Kaminoyama,R.Misumi
Chemical Engineering Science 60 ( 8-9 ) 2419 - 2426 2005.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER Joint Work
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R. MISUMI, N.NAKAMURA, K.NISHI, M.KAMINOYAMA
Journal of Chemical Engineering of Japan 37 ( 12 ) 1452 - 1460 2004.12 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：SOC CHEMICAL ENG JAPAN Joint Work
Other Link： http://www.jstage.jst.go.jp/article/jcej/37/12/37_1452/_article
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Drag and Lift Forces Acting on a Spherical Bubble in a Linear Shear Flow
R.Kurose, S.Komori,R.Misumi
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW 27 ( 7 ) 1247 - 1258 2001.7 [Reviewed]
Language：English Publishing type：Research paper (international conference proceedings) Publisher：ELSEVIER Joint Work
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The Effects of Bubbles on Mass Transfer Across Breaking Air-Water Interface
AGU Geophysical Monograph Series, Gas Transfer at Water Surfaces 127 285 - 290 2001 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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The Effects of Bubbles on Mass Transfer across Breaking Air-Water Interfaces.
MISUMI Ryuta,KOMORI Satoru,ISHIDU Masao
Transactions of the Japan Society of Mechanical Engineers, B 66 ( 649 ) 2327 - 2334 2000.9 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers Joint Work
Other Link： https://www.jstage.jst.go.jp/article/kikaib1979/66/649/66_649_2327/_article/-char/ja/
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Turbulence Structure and Mass Transfer at a Win-Driven Air-Water Interface
T.Shimada, S.Komori,R.Misumi
Wind-Over-Wave Couplings: Perspectives and Prospects, OXFORD University press 273 - 285 1999 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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KUROSE Ryoichi,MISUMI Ryuta,KOMORI Satoru
Transactions of the Japan Society of Mechanical Engineers, B 64 ( 622 ) 1781 - 1785 1998.6 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers Joint Work
Other Link： https://www.jstage.jst.go.jp/article/kikaib1979/64/622/64_622_1781/_article/-char/ja/
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The Effect of Sea Water on CO2 Transfer velocity across the Air-Water Interface
SHIMADA Takashi,MIZUMI Ryuta,KOMORI Satoru
Transactions of the Japan Society of Mechanical Engineers, B 64 ( 621 ) 1470 - 1477 1998.5 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers Joint Work
Other Link： https://www.jstage.jst.go.jp/article/kikaib1979/64/621/64_621_1470/_article/-char/ja/