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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

PARTICLE−TURBULENCE INTERACTION IN A BOUNDARY LAYER

Get access (open in a dialog) DOI: 10.1615/IHTC10.5270
pages 81-92

Abstract

Particle-turbulence interaction in the boundary layer of a flume is studied experimentally and numerically. The coherent structures in the wall region are funnel shaped vortices which lie between the low speed regions on the wall. these vortices are responsible for most of the Reynolds stress in the main stream and for the heat transfer from the wall region.
Addition of particles to the water, even at very low concentrations of 10−4 , has some profound effect on the turbulence and on the heat transfer. It is shown that though the time between funnel vortices increases, the Reynolds stress in the main stream may increase or decrease, and the heat transfer rate from the wall increases.
The rate of heat transfer from the wall to the liquid may increase by ~ 30%, depending on particle size and loading.