期刊
PHYSICS OF FLUIDS
卷 25, 期 1, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.4775363
关键词
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资金
- Japan Aerospace Exploration Agency (JAXA)
- Japan Society for the Promotion of Science (JSPS) [KAKENHI 24760670]
- U.S. Air Force Turbulence Program [FA9550-11-1-0111]
A dynamic non-equilibrium wall-model for large-eddy simulation at arbitrarily high Reynolds numbers is proposed and validated on equilibrium boundary layers and a non-equilibrium shock/boundary-layer interaction problem. The proposed method builds on the prior non-equilibrium wall-models of Balaras et al. [AIAA J. 34, 1111-1119 (1996)] and Wang and Moin [Phys. Fluids 14, 2043-2051 (2002)]: the failure of these wall-models to accurately predict the skin friction in equilibrium boundary layers is shown and analyzed, and an improved wall-model that solves this issue is proposed. The improvement stems directly from reasoning about how the turbulence length scale changes with wall distance in the inertial sublayer, the grid resolution, and the resolution-characteristics of numerical methods. The proposed model yields accurate resolved turbulence, both in terms of structure and statistics for both the equilibrium and non-equilibrium flows without the use of ad hoc corrections. Crucially, the model accurately predicts the skin friction, something that existing non-equilibrium wall-models fail to do robustly. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4775363]
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