童兵,祝兵,周本宽. 绕方柱流脉动压力场的大涡模拟[J]. 水利水运工程学报, 2002, (1): 8-11.
引用本文: 童兵,祝兵,周本宽. 绕方柱流脉动压力场的大涡模拟[J]. 水利水运工程学报, 2002, (1): 8-11.
TONG Bing,ZHU Bing,Zhou Ben kuan. Large eddy simulation of pulsating pressure field for flow around a square cylinder[J]. Hydro-Science and Engineering, 2002, (1): 8-11.
Citation: TONG Bing,ZHU Bing,Zhou Ben kuan. Large eddy simulation of pulsating pressure field for flow around a square cylinder[J]. Hydro-Science and Engineering, 2002, (1): 8-11.

绕方柱流脉动压力场的大涡模拟

Large eddy simulation of pulsating pressure field for flow around a square cylinder

  • 摘要: 采用有限差分法,对雷诺数为22000的绕方柱流的脉动压力场进行了三维大涡模拟。采用时间分解算子法,将N-S方程分为对流分步、扩散分步和传播分步,再分别进行计算,在大涡模拟中,用两层模型处理Smagorinsky模型在近壁区模拟结果的发散问题。计算的压力场以及阻力系数、升力系数和Strouhal数均与试验结果较为吻合。

     

    Abstract: D large eddy simulation (LES) of the pulsating field for flow around a square cylinder with a Reynolds' number of 22 000 is carried out by use of finite difference method. By using the split operator method, the N S equation is divided into three steps, namely convection, diffusion and propagation steps, to be calculated separately. A two layer model is employed to deal with divergence near the wall of Smagorinsky model. The calculated pressure field, lifting coefficient and Strouhal number accord with the experimental results.

     

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