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Turbulence Heat and Mass Transfer 5. Proceedings of the International Symposium on Turbulence Heat and Mass Transfer
September, 25-29, 2006, Dubrovnik, Croatia

DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf


ISBN Print: 978-1-56700-229-4

ISSN: 2377-2816

LES of Scalar Dispersion over a Gaussian Hill

pages 713-716
DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf.1550
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ABSTRACT

A large eddy simulation (LES) with the dynamic Smagorinsky-Germano subgrid-scale (SGS) model is used to study scalar dispersion in a turbulent flow over a Gaussian hill. Fluid particles are tracked in a Lagrangian way. The velocity of fluid elements is considered to have a large-scale part (directly computed by the LES) and a small-scale part. The SGS velocity of the fluid particles is given by a three-dimensional Langevin model written in terms of SGS statistics. The results of the LES are compared with the wind-tunnel experiments on flow and scalar dispersion over a two-dimensional hill.

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