报告题目（Title）🧳⟹：Heat transfer enhancement in dense suspensions of agitated solids

报告人（Reporter）：Prof. Michel Louge；Cornell University

报告时间（Time）： Mar.28th (Monday) 3:00pm-5:00pm

报告地点（Site）：B-515, Lee Shau Kee Building of Science and Technology

简介🦕：Abstract

We predict heat transfer enhancement through dense homogeneous suspensions of agitated solids in conductive fluids by coupling the fluid and solid phases through a volumetric source term. The enhancement is governed by a Damkohler number demarcating an "exchange limit", where the source term dominates, and a "diffusion limit" set by the ability of agitated particles to self-diffuse. We point out effects of particle ordering on mixture conductivity and volumetric heat exchange rate, carry out thermal simulations to justify the form of these terms, and model further enhancements from gas velocity fluctuations induced by solids of high agitation.

报告人介绍：Brief Biography

Michel Louge received an Engineering degre from the Ecole Centrale de Paris in 1978 and a PhD from Stanford University in 1985 for work with Professor Ronald Hanson on combustion kinetics. He joined Cornell University the same year. His research has contributed to the scale-up of circulating fluidized beds under atmospheric and pressurized conditions; the behavior of pressurized cyclone separators; the interactions of gas and solid particles in pneumatic transport of particles; the impact of small solid spheres; the heat transfer in suspensions of gases and agitated solids; flows of grains on inclines; segregation and flow of grains in microgravity; mechanisms of particle interactions in confined agitated granular media; moisture, heat and dust within desert sand dunes; powder snow avalanches; and unsaturated porous media.