Properties of the hybrid RANS/LES filter

被引:0
作者
Massimo Germano
机构
[1] Politecnico di Torino,Dip. di Ing. Aeronautica e Spaziale
来源
Theoretical and Computational Fluid Dynamics | 2004年 / 17卷
关键词
turbulence modeling; turbulence simulation; LES approach;
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摘要
One of the most important and challenging topics in the Large Eddy Simulation of turbulent flows is the connection of the LES technique to the well known and largely used RANS approach where the Navier–Stokes equations are Reynolds averaged. The hybridation of LES and RANS is not only important for its possible practical use, (a rational use of the computational means in different zones), but also from a theoretical point of view, and one possible procedure consists of blending RANS and LES models in the transition zone. In this paper a new filtering technique based on blending filters which transitions smoothly between LES and RANS is proposed and the associated universal model for the subgrid scale stresses is derived.
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页码:225 / 231
页数:6
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