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Wavelet-based adaptive large-eddy simulation with explicit filtering
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DOI：10.1016/j.jcp.2012.09.030.png)
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Stochastic coherent adaptive large-eddy simulation is a novel approach to the numerical simulation of turbulence, where the coherent energetic eddies are solved for, while modeling the influence of the less energetic coherent/incoherent background flow. The formal separation between resolved and unresolved field is obtained by wavelet threshold filtering that is inherent to the adaptive wavelet collocation numerical method. A new explicit wavelet filtering strategy is introduced and tested, by considering two different filtering levels: the physical level, which controls the turbulence model, and the numerical level that is responsible for the accuracy of numerical simulations. The theoretical basis for wavelet-based adaptive large-eddy simulation with explicit filtering and consistent dynamic modeling is given. Numerical experiments are presented for unsteady homogeneous turbulence, demonstrating the existence of grid-independent solutions. (C) 2012 Elsevier Inc. All rights reserved.
Keyword:
Turbulent flows
Coherent structures
Wavelets
Adaptive large eddy simulation
Explicit filtering
期刊
IF:
3.8
论文数:
1.6W
被引数:
7.4W
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PHYSICS OF FLUIDS
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PHYSICS OF FLUIDSIF4.3
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