The following contribution to IUTAM Symposium on Dynamics and Interface Phenomena of Bubbles and Droplets at Multiple Scales (3-5 December) was made by our research group:

• K. Hayashi, T. Mori, K. Chujo, R. Igarashi, R. Kurimoto, A. Tomiyama, Surface Coverage of Bubbles with Surfactant or Particles

The following contributions to ISMTMF-2023 (27-30 November) were made by our research group:

• T. Mori, R. Igarashi, K. Hayashi, R. Kurimoto, A. Tomiyama, Measurements of Surfactant Amount at the Gas-Liquid Interface in Contaminated Taylor Flows in a Microchannel
• S. Horita, Ryo Kurimoto, K. Hayashi, A. Tomiyama, Effects of Surfactant on Bubbly Flow in Narrow Rectangular Column
• K. Hayashi, K. Chujo, R. Kurimoto, A. Tomiyama, Drag Coefficients of Particle-Covered Bubbles Produced Using a Microchannel

Dr. Roberta Fatima Neumeister (University of Sao Paulo) has joined us for Postdoc Internship sponsored by FAPESP.

Lab visit on 15 Sep.

• Prof. Roberto Zenit, Brown University
• Prof. Yoshiyuki Tagawa, Tokyo University of Agriculture and Technology
• Prof. Toshiyuki Sanada, Shizuoka University
• Dr. Hiroaki Kusuno, Tokyo University of Agriculture and Technology

R. Koto was awarded the Best Presentation Awards from the Japanese Society for Multiphase Flow.

Presentations at Multiphase Flow Symposium 2023 (24-26 Aug@Hokkaido University), the annual symposium of the Japanese Society for Multiphase Flow.

• Koto, R. et al., Effects of pipe diameter on interfacial and wall friction factors of swirling annular flows in a vertical pipe (in Japanese)
• Mori, T. et al., Study of surfactant adsorption on the surface of bubbles in a micro-channel (in Japanese)
• Chujo, K. et al., Measurement of drag coefficient of particle-attached bubbles generated by using micro-channel (in Japanese) [supported by ]
• Watanabe, N. et al., Effect of bend curvature on void fraction of gas-liquid two-phase flow in a U-shaped bend (in Japanese)
• Hayashi, K. et al., Effects of surfactant on drag and interfacial vorticity of spherical bubble (in Japanese)

@AJKFED 2023, Osaka

• R. Kurimoto, et al. Effects of Fine Particles and Surfactant on Bubbly Flows in Narrow Rectangular Column

Following contributions to ICMF-2023 (2-7 April@Kobe) were made from/with our research group:

• Kosuke Hayashi, Lift Correlations of Ellipsoidal Bubbles in Low and High Viscosity Liquids [Keynote Lecture]
• Ryo Kurimoto (Kobe University); Shin Takaya (Kobe University); Kosuke Hayashi (Kobe University); Akio Tomiyama (Kobe University), Bubbly flows in a column with submerged hollow fiber membranes
• Timo A. Merbach (Hamburg University of Technology), Benas Mockus (University of Edinburgh), Kazuma Minamitani (Kobe University), Felix Kexel(Hamburg University of Technology) , Michael Schluter (Hamburg University of Technology), Prashant Valluri (University of Edinburgh), Kosuke Hayashi (Kobe University), Akio Tomiyama (Kobe University), Development of a correlation for the terminal rising velocity for 2D-bubbles in unconfined domain (Poster presentation)
• Benas Mockus (University of Edinburgh); Timo A. Merbach (Hamburg University of Technology); Prashant Valluri (University of Edinburgh); Michael Schlüter (Hamburg University of Technology); Ryo Kurimoto (Kobe University); Kosuke Hayashi (Kobe University); Akio Tomiyama (Kobe University), Terminal velocity and mass transfer of 2D bubbles in a confined hele-shaw cell (Poster presentation)
• Naoki Shimada (Sumitomo Chemical Co. Ltd.); Yusuke Uchihashi (Sumitomo Chemical Co. Ltd.); Yuta Yaegashi (Sumitomo Chemical Co. Ltd.); Miya Matsuo (Sumitomo Chemical Co. Ltd.); Mitsuhiro Ohta (Tokushima University); Akio Tomiyama (Kobe University), Improvement of simple CLSVOF method in the full Eulerian framework (Poster presentation)
• Hendrik Hessenkemper (Helmholtz-Zentrum Dresden-Rossendorf); Dirk Lucas (Helmholtz-Zentrum Dresden-Rossendorf); Akio Tomiyama (Kobe University), The lift force of ellipsoidal bubbles in water and the influence of surfactants on it

Undergraduate students joined us (the list of the members in 2023).

Dr. Mirco Magnini (University of Nottingham) and Dr. Sepideh Khodaparast (University of Leeds) visited our lab.