计算物理 ›› 2004, Vol. 21 ›› Issue (3): 289-293.

• 研究论文 •    下一篇

新型大涡数值模拟亚格子模型及应用

崔桂香1, 周海兵1, XU Chun-xiao1, 张兆顺1, L. Shao2   

  1. 1. 清华大学工程力学系, 北京 100084;
    2. Laboratory of Fluid Mechanics and Acoustics, Ecole Centrale de Lyon
  • 收稿日期:2003-02-12 修回日期:2003-07-30 出版日期:2004-05-25 发布日期:2004-05-25
  • 作者简介:崔桂香(1950-),女,北京,教授,硕士,从事标量湍流的理论和实验研究.
  • 基金资助:
    国家自然科学基金(10272065,10232020);中法实验室(LIAMA)及清华大学基础研究基金(JC2002207)资助项目

A New Subgrid Eddy Viscosity Model and Its Application

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

  1. 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

摘要: 基于湍流大小尺度间动量输运的结构函数方程,提出了一种新的湍流大涡模型(LES)亚格子涡粘模式.新亚格子涡粘系数正比于纵向速度增量的扭率,它表征大小尺度湍流间的能量输运和耗散之比.新模式通过各向同性湍流直接数值模拟数据库的检验,并用于槽道湍流的大涡模拟计算,将所得结果与DNS结果进行了比较.

关键词: 大涡模拟, 亚格子模式, 涡粘性, 结构函数

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

中图分类号: