中国物理B ›› 2003, Vol. 12 ›› Issue (1): 67-74.doi: 10.1088/1009-1963/12/1/312

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Lattice-BGK simulation of a two-dimensional channel flow around a square cylinder

施保昌1, 郭卫斌2, 王能超2, 郭照立3   

  1. (1)Parallel Computing Institute, Huazhong University of Science and Technology, Wuhan 430074, China; (2)School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; (3)State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2002-06-21 修回日期:2002-07-28 出版日期:2003-01-20 发布日期:2003-01-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60073044), and the State Key Development Programme for Basic Research of China (Grant No G1999022207).

Lattice-BGK simulation of a two-dimensional channel flow around a square cylinder

Guo Wei-Bin (郭卫斌)a, Wang Neng-Chao (王能超)ab, Shi Bao-Chang (施保昌)b, Guo Zhao-Li (郭照立)c   

  1. a School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; b Parallel Computing Institute, Huazhong University of Science and Technology, Wuhan 430074, China; c State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2002-06-21 Revised:2002-07-28 Online:2003-01-20 Published:2003-01-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60073044), and the State Key Development Programme for Basic Research of China (Grant No G1999022207).

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摘要： The confined flow around a square cylinder mounted inside a two-dimensional channel (blockage ratio $\be=1/8$) was investigated in detail by a newly developed incompressible nonuniform lattice-BGK model. It is found that the vortex shedding behind the cylinder induces periodicity in the flow field, and the periodicity of the flow will lose for $Re>$300. A detailed analysis for a range of Reynolds numbers between 1 and 500 was presented. Quantitative comparisons with other methods show that the model gives accurate results for complex flows.

Abstract: The confined flow around a square cylinder mounted inside a two-dimensional channel (blockage ratio $\beta=1/8$) was investigated in detail by a newly developed incompressible nonuniform lattice-BGK model. It is found that the vortex shedding behind the cylinder induces periodicity in the flow field, and the periodicity of the flow will lose for $Re>$300. A detailed analysis for a range of Reynolds numbers between 1 and 500 was presented. Quantitative comparisons with other methods show that the model gives accurate results for complex flows.

Key words: lattice-BGK method, square cylinder, Strouhal number, drag coefficient

中图分类号:  (Flow phenomena in quasi-one-dimensional systems)

  • 47.60.-i