A New Subgrid Eddy Viscosity Model and Its Application

CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2004, Vol. 21 ›› Issue (3): 289-293.

A New Subgrid Eddy Viscosity Model and Its Application

CUI Gui-xiang¹, ZHOU Hai-bing¹, XU Chun-xiao¹, ZHANG Zhao-shun¹, L. Shao²

1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
2. Laboratory of Fluid Mechanics and Acoustics, Ecole Centrale de Lyon, France

Received:2003-02-12 Revised:2003-07-30 Online:2004-05-25 Published:2004-05-25

Abstract

Abstract: A new subgrid eddy viscosity model is proposed. The new subgird eddy viscosity is proportional to the skewness of longitudinal velocity increment, which characterizes the transportation of turbulent momentum bteween resolved and unresolved turbulence. The new model is verified by a DNS data bank of isotropic turbulence, and has been applied to the turbulent channel flow. The results show to be in good agreement with DNS ones.

Key words: large eddy simulation, subgrid model, subgrid eddy viscosity, structure function

CLC Number:

O241

CUI Gui-xiang, ZHOU Hai-bing, XU Chun-xiao, ZHANG Zhao-shun, L. Shao. A New Subgrid Eddy Viscosity Model and Its Application[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2004, 21(3): 289-293.

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A New Subgrid Eddy Viscosity Model and Its Application

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