後向ステップ剥離・再付着流の層流熱伝達 : プラントル数の影響

抄録

Laminar heat transfer in separating and reattaching flow was numerically studied by simulating flow and heat transfer behind a backward-facing step, in which the temperature field was investigated in a very wide range of Prandtl number to elucidate its influence on heat transfer. It was demonstrated that the heat-transfer enhancement, usually assumed around the flow reattachment point, is not consistently realized. It occurred for the cases of Prandtl numbers greater than 0.1, but was by no means observed for lower Prandtl number cases.