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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

On the mean momentum balance in gas-solid channel flows

pages 711-716
DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.780
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要約

The role of the particle force in the mean momentum balance of a fully-developed particle-laden turbulent channel flow is considered. The reaction force from inertial point-particles in two-way coupled simulations assists the viscous and turbulent shear stresses to balance the driving pressure gradient. The strongest effect is observed about 18 viscous length units away from the wall. The accompanying particle viscosity tends to increase the total viscosity, but the turbulent eddy viscosity is nevertheless reduced. The effect of particle additives is therefore twofold: they alter the apparent viscosity of the suspension and modulate the turbulent flow field.

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