Seminar "Rheology of bubble-bearing fluids and its application to flow prediction" by Prof. Kohei Ohie

Speaker

Prof. Kohei Ohie 
Assistant Professor, Graduate School of Engineering, Nagoya University

Title 

Rheology of bubble-bearing fluids and its application to flow prediction

Abstract

Research on the rheology of suspensions containing particles, droplets, and bubbles has a history spanning more than a century, tracing back to Einstein’s pioneering work. Among these, bubble suspensions exhibit particularly distinctive behaviors. Their effective viscosity may either increase or decrease relative to the continuous phase, depending on the deformation state of the bubbles, and viscoelasticity can emerge under certain conditions. In this seminar, I will provide an overview of bubble suspension rheology and present an approach to its systematization through dimensionless numbers. I will also highlight applications where the developed rheological models are utilized to predict and systematically understand bubble-bearing fluid flows commonly encountered in both natural and industrial contexts.

Short bio 

EDUCATION

Oct. 2021−Mar. 2024, Doctor of Engineering, Graduate School of Engineering, Hokkaido University

CARRER

Dec. 2022−Mar. 2023, Guest Researcher, School of Physics & Astronomy, University of Manchester

Apr. 2024−Mar. 2025, JSPS Postdoctoral Fellowships for Young Scientists (PD)

Apr. 2025−Current, Assistant Professor, Graduate School of Engineering, Nagoya University

AWARD

Feb. 2025, Inoue Research Award for Young Scientists, Study on multi-timescale rheology of heterogeneous fluids by advancement of velocity-profiling-based rheometry