Recent Progress in Boiling Flow Simulation using Interface Resolving Scheme

by Dr Yohei Sato

Thursday 14 Nov 2019, 15:00 → 16:00 Europe/Zurich

OHSA/E13 (Paul Scherrer Institut)

The presented talk outlines the recent progress in boiling flow simulation using an interface resolving scheme developed at CFD group in LSM. Interface resolving schemes, such as Volume of Fluid, Level-Set methods, require fine computational grid to capture the liquid-vapor interface, and the simulation was previously limited to several growing bubbles due to the computational cost. However, thanks to the continuous speedup of computer hardware and the development of numerical modellings for boiling flow, it becomes feasible to compute boiling flow in engineering scale somehow. The development of measuring technique for boiling flow in recent years definitely helps the development of numerical method with respect to the validation. Our long-term goal is (i) to understand the mechanisms of boiling flow, i.e. Critical Heat Flux (CHF), through numerical simulation, and (ii) to derive of boiling model for Euler-Euler approach. First, we present the simulation for the single bubble growth experiment done at MIT, followed by a pool boiling simulation, ranging from nucleate boiling to film boiling through CHF, see the figure below. Then, subcooled convective boiling is validated, which includes Departure from Nucleate Boiling (DNB).  The discussion includes prospective of the development of boiling flow simulation incorporated with deep neural networks.

 Bio: Dr. Yohei Sato studied as a Masters student at the Department of Naval Architecture and Ocean Engineering, Faculty of Engineering of the University of Tokyo, graduating in 1999. After graduation, he worked for Asahi Glass Co., Ltd. as a research engineer for three years. From 2002 to 2009, he worked for the Center for CFD Research at the National Maritime Research Institute. During this period, he studied as a part-time student on a doctoral course at the University of Tokyo, and received his Ph. D. degree in 2006. Since 2009, he has been working at Paul Scherrer Institute in Switzerland as a scientist. His major research field is Computational Fluid Dynamics, especially for free-surface flows and phase-change phenomena.