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THMT-12. Proceedings of the Seventh International Symposium On Turbulence Heat and Mass Transfer
September, 24-27, 2012, Palermo, Italy

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal


ISBN Print: 978-1-56700-302-4

ISSN: 2377-2816

Reynolds number effect on particle-laden channel flows

pages 1090-1093
DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.1130
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SINOPSIS

The effect of Reynolds number on particle velocity statistics and preferential concentration in a channel flow are studied using large eddy simulation and a Lagrangian particle tracking technique. Three different particle Stokes numbers (St = 1, 5, 25), a measure of particle inertia, are investigated for four different shear Reynolds numbers, Reτ = 150, 300, 590 and 2000, corresponding to transitional, low, moderate and high levels of turbulence. It is found that for all Reynolds numbers studied an increase of the particle Stokes number increases the preferential concentration of the particles in the near-wall region, while for a fixed Stokes number, increasing the turbulence of the fluid reduces the extent to which the particles accumulate at the wall.

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