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Turbulence Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence Heat and Mass Transfer
September, 14-18, 2009, Rome, Italy

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf


ISBN Print: 978-1-56700-262-1

ISSN: 2377-2816

High-order large-eddy simulation of space-temporal development of the turbulent wake of a sphere in a thermally stratified fluid

page 9
DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.260
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要約

We compute the turbulent wake of a sphere in thermally stratified water at Reynolds and internal Froude numbers Re = 104 and F = 25. To compute the far wake without using ad hoc initial conditions, we first provide a space development study and then focus on a part of the wake to carry on a temporal computation. The study is based on using a high-order multi-domain spectral solver and the LES (Large-Eddy Simulation) capability is implemented through a SVV (Spectral Vanishing Viscosity) technique (SVV-LES approach). The numerical results conform with the experiments, especially showing the expected development of the wake and the so-called three-Dimensional, Non-Equilibrium and Quasi two-Dimensional regimes.

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