S053072 Measurement of Time and Spatial Characteristics of Heat Transfer and Fluid Flow with Mist in the Region behind the Backward-Facing Step

Abstract

This study is about the heat transfer enhancement in a backward-facing step flow with a little amount of mist.In the forced convection place which used the air flow, a little amount of mist is made to mix to the separated-shear-layer and the spatial temperature in the channel is decreased by using the evaporation latent heat of the mist. Therefore, a thermal boundary layer can be changed without changing a velocity profile and it does not cause pressure loss. The experiments were conducted to examine the effects of thermal and flow field in the channel by changing amount of mist using Infrared Camera and High-speed camera. It is concluded that changing amount of mist supply is effective to enhance the heat transfer.