Heat Transfer Characteristics in a Channel Flow with Rectangular Cylinder.

Abstract

An experimental study of heat transfer has been conducted in a channel flow with rectangular cylinder having the various width-to-height ratio, b/h, of 0.5, 1, 2 and 3. The measurement of heat flux fluctuation at the channel wall and flow visualization of smoke-wire method with high speed video recordings were synchronized in order to investigate the relation between heat transfer enhancement and shedding vortices from the cylinder. It is clarified that heat transfer is augmented by the wall-ward flow which is induced by the clockwise and counter-clockwise vortices shed alternately from the cylinder.