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Sixth International Symposium on Turbulence and Shear Flow Phenomena
June, 22-24, 2009 , Seoul National University, Seoul, Korea

DOI: 10.1615/TSFP6

MECHANISMS OF PARTICLE DISPERSION AND DEPOSITION IN A TURBULENT SQUARE DUCT FLOW

pages 1305-1310
DOI: 10.1615/TSFP6.2080
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RÉSUMÉ

Particle dispersion in a square duct flow is studied using large eddy simulation combined with Lagrangian particle tracking under conditions of one-way coupling. The flow has a bulk Re = 250k, with six particle sizes ranging from 5 to 1000 μm examined. For the particles, predictions demonstrate that secondary flows within the duct dominate small particle dispersion, and result in a uniform distribution, whilst gravity promotes the deposition of large particles on the duct floor. A detailed analysis of the influence of the flow on particle distribution is provided through consideration of the particle dispersion function.

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