Papers - Fujioka, Satoko

Unique properties of fine bubbles in the electrochemical reduction of carbon dioxide using boron-doped diamond electrodes

Mai Tomisaki, Keisuke Natsui, Satoko Fujioka, Koichi Terasaka, Yasuaki Einaga

Electrochimica Acta 389 ( 1 ) 138769 2021.06

Research paper (scientific journal), Joint Work, Accepted

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Characterization of Water/Organic Biphasic System in Liquid-Liquid Slug Flow under Hydrothermal Conditions: Solvation, Vorticity and Hydrophobicity

Toshinori Shimanouchi, Satoko Fujioka, Tatsuya Tanifuji, Kenta Yamamoto, Koichi Terasaka, Yukitaka Kimura

Solvent Extraction Research and Development Japan 28 ( 1 ) 21 - 35 2021.06

Research paper (scientific journal), Joint Work, Accepted

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ウルトラファインバブル水の国際輸送

田中俊也, 成瀬祐里, 寺坂宏一, 藤岡沙都子, 山本陽子, 野口雄介, 山崎京香, 庄村拓也, 原田駿

混相流 35 ( 1 ) 185 - 196 2021.02

Research paper (scientific journal), Joint Work, Accepted

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Experimental study and prediction by computational fluid dynamics on self-induced sloshing due to bubble flow in a rectangular vessel

Ryohei Aoki, Satoko Fujioka, Koichi Terasaka

Journal of Chemical Engineering of Japan (The Society of Chemical Engineers, Japan)  54 ( 2 ) 51 - 57 2021.02

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00219592

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Self-induced sloshing is an oscillatory phenomenon of a free liquid surface due to the flow of a fluid. This phenomenon has been reported in some gas–liquid reactors, and it is important to predict and prevent its occurrence for the safe operation of the reactors. However, the fundamental knowledge on the self-induced sloshing by bubble flow, such as the frequency and amplitude, is insufficient, and the occurrence condition has not been clarified. The purpose of this study is to investigate the characteristics of self-induced sloshing by bubble flow experimentally. We attempt to reproduce self-induced sloshing by using computational fluid dynamics (CFD) and establish a CFD model for the prediction of the occurrence of self-induced sloshing. In the experiments, air bubbles were dispersed into a liquid from the bottom of a rectangular vessel. The effects of the air flow rate and static liquid height on the characteristics of self-induced sloshing were investigated experimentally by image analysis. The occurrence of self-induced sloshing was confirmed by increasing the airflow rate at a specific static liquid height. The amplitude reached a maximum at the static liquid height, where self-induced sloshing was most likely to occur, and the frequency decreased with increasing static liquid height. Next, in order to reproduce the self-induced sloshing through CFD, an appropriate drag model of the bubbles was selected. Although the amplitude was overestimated due to the absence of the foam layer, the predicted frequency agreed well with the experimental value. Finally, the movement of the circulation flow was analyzed, and its correlation with the self-induced sloshing was clarified.

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Generation and Long-term Stability of Ultrafine Bubbles in Water

Shunya Tanaka, Koichi Terasaka, Satoko Fujioka

Chemie Ingenieur Technik (Wiley)  93 ( 1-2 ) 168 - 179 2020.12

Research paper (scientific journal), Joint Work, Accepted,  ISSN  1522-2640

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Dissolution and Shrinking of a Single Microbubble in Stationary Liquid with Surfactants

Satoko Fujioka, Kanako Mizuno, Koichi Terasaka

Chemie Ingenieur Technik (Wiley)  93 ( 1-2 ) 216 - 222 2020.11

Research paper (scientific journal), Joint Work, Accepted,  ISSN  1522-2640

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For a variety of applications of microbubbles, it is necessary to clarify the dissolution dynamics and the lifetime of a microbubble. Although various models have been proposed, predicting the dissolution rate of a microbubble in a static fluid with a surfactant is still difficult. In this study, dissolution behavior was predicted with taking into account the mass transfer inhibition effect due to a surfactant at the bubble surface. The shrinking behavior of an oxygen microbubble was observed with several surfactants and the experimental results were in good agreement with model predictions.

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Concentration and Dilution of Ultrafine Bubbles in Water

Shunya Tanaka, Yuri Naruse, Koichi Terasaka, Satoko Fujioka

Colloids and Interfaces (MDPI)  4 ( 4 ) 50 2020.11

Research paper (scientific journal), Joint Work, Accepted,  ISSN  2504-5377

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加減圧の繰り返し操作による水中からのウルトラファインバブル生成

山崎京香,　寺坂宏一,　藤岡沙都子

混相流 34 ( 4 ) 532 - 540 2020.10

Research paper (scientific journal), Joint Work, Accepted,  ISSN  1881-5790

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Destabilization of ultrafine bubbles in water using indirect ultrasonic irradiation

Shunya Tanaka, Hirona Kobayashi, Seika Ohuchi,　Koichi Terasaka, Satoko Fujioka

Ultrasonics Sonochemistry (Elsevier)  71   105366 2020.10

Research paper (scientific journal), Joint Work, Accepted,  ISSN  1350-4177

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加圧容器からのスプレー噴射による酸素ウルトラファインバブル水の製造

山崎京香,　寺坂宏一,　藤岡沙都子

混相流 34 ( 3 ) 436 - 443 2020.07

Research paper (scientific journal), Accepted,  ISSN  1522-2640

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Synthesis, kinetic study, and reaction mechanism of Li₄SiO₄ with CO₂ in a slurry bubble column reactor

Yugo Kanai, Koichi Terasaka, Satoko Fujioka

Chemical Engineering Communications (Taylor&Francis)  207 ( 5 ) 598 - 611 2019.05

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00986445

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Mass transfer from freely rising microbubbles in aqueous solutions of surfactant or salt

Shunya Tanaka, Sven Kastens, Satoko Fujioka, Michael Schlüter M, Koichi Terasaka

Chemical Engineering Journal (Elsevier)  387 ( 1 ) 121246 2019.03

Research paper (scientific journal), Joint Work, Accepted,  ISSN  13858947

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Absorption of carbon dioxide at high temperature with molten alkali carbonate using bubble column reactor

Yugo Kanai, Koichi Terasaka, Satoko Fujioka, Kenichiro Fukunaga

Journal of Chemical Engineering of Japan (The Society of Chemical Engineers, Japan)  52 ( 1 ) 31 - 40 2019.01

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00219592

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水平摺動するノズルからの微細気泡生成

村上大地郎, 寺坂宏一, 藤岡沙都子

混相流 31 ( 4 ) 422 - 426 2017.12

Research paper (scientific journal), Joint Work, Accepted

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水中を収縮しつつ浮上する単一マイクロバブルからの物質移動

岩切扶樹，寺坂宏一，藤岡沙都子, M. Schlueter, S. Kastens and 田中俊也

混相流 30 ( 5 ) 529 - 535 2017.03

Research paper (scientific journal), Joint Work, Accepted

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The Establishment of Experimental Method to Observe Bubble Formation in High Temperature Molten Salt System and Estimation of Generated Bubble Size

Yugo Kanai, Koichi Terasaka, Satoko Fujioka and Kazumi Suzukawa

Journal of Chemical Engineering of Japan 50 ( 2 ) 86 - 93 2017.02

Research paper (scientific journal), Joint Work, Accepted

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CFDシミュレーションを用いた屈曲流路から成る乳化用スタティックミキサーの開発

藤岡沙都子

Fooma技術ジャーナル 11 ( 2 ) 31 - 35 2017.02

Research paper (scientific journal), Single Work, Accepted

Estimation of total oxygen transfer into aeration tank

Kazue Shibata, Koichi Terasaka, Satoko Fujioka, Kaoru Kato

Journal of Chemical Engineering of Japan 49 ( 7 ) 588 - 594 2016.07

Joint Work, Accepted

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Oxygen transfer from a free surface and dispersed bubbles in an aeration tank

Kazue Shibata, Koichi Terasaka, Satoko Fujioka, Kaoru Kato

Journal of Chemical Engineering of Japan 49 ( 5 ) 391 - 398 2016.05

Research paper (scientific journal), Joint Work, Accepted

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Chemical Conversion and Liquid-Liquid Extraction of 5-Hydroxymethylfurfural from Fructose by Slug Flow Microreactor

Toshinori Shimanouchi, Yoshitaka Kataoka, Tatsuya Tanifuji, Yukitaka Kimura,FUJIOKA Satoko, Koichi Terasaka

AIChE Journal 62 ( 6 ) 2135 - 2143 2016.02

Research paper (scientific journal), Joint Work, Accepted

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