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Applied Mathematics and Mechanics (English Edition) ›› 2000, Vol. 21 ›› Issue (2): 165-172.

• 论文 • 上一篇    下一篇

A SECOND-ORDER DYNAMIC SUBGRID-SCALE STRESS MODEL

龚洪瑞1, 陈十一2, 何国威3, 曹念铮2   

  1. 1. Center for Adaptive Systems Application, Inc, 1911 Central, Los Alamos, NM 87544, U. S. A;
    2. Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, NM 87545, U. S. A;
    3. Loboratory for Nonlinear Mechanics, Institute of Mechanics, Academia Sinica, Beijing 100080, P. R. China
  • 收稿日期:1998-08-10 出版日期:2000-02-18 发布日期:2000-02-18
  • 通讯作者: He Guowei
  • 基金资助:
    Department of Energy at Los Alamos National Laboratory

A SECOND-ORDER DYNAMIC SUBGRID-SCALE STRESS MODEL

Gong Hongrui1, Chen Shiyi2, He Guowei3, Cao Nianzhen2   

  1. 1. Center for Adaptive Systems Application, Inc, 1911 Central, Los Alamos, NM 87544, U. S. A;
    2. Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, NM 87545, U. S. A;
    3. Loboratory for Nonlinear Mechanics, Institute of Mechanics, Academia Sinica, Beijing 100080, P. R. China
  • Received:1998-08-10 Online:2000-02-18 Published:2000-02-18
  • Supported by:
    Department of Energy at Los Alamos National Laboratory

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摘要： A second-order dynamic model based on the general relation between the subgrid-scale stress and the velocity gradient tensors was proposed. A priori test of the second-order model was made using moderate resolution direct numerical simulation date at high Reynolds number (Taylor microscale Reynolds number Rλ=102～216) for homogeneous, isotropic forced flow, decaying flow, and homogeneous rotating flow. Numerical testing shows that the second-order dynamic model significantly improves the correlation coefficient when compared to the first-order dynamic models.

关键词: turbulent flow, dynamic model, subgrid-scale stress model, Smagorinsky model

Abstract: A second-order dynamic model based on the general relation between the subgrid-scale stress and the velocity gradient tensors was proposed. A priori test of the second-order model was made using moderate resolution direct numerical simulation date at high Reynolds number (Taylor microscale Reynolds number Rλ=102～216) for homogeneous, isotropic forced flow, decaying flow, and homogeneous rotating flow. Numerical testing shows that the second-order dynamic model significantly improves the correlation coefficient when compared to the first-order dynamic models.

Key words: turbulent flow, dynamic model, subgrid-scale stress model, Smagorinsky model

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