Chinese Journal of Theoretical and Applied Mechani ›› 2011, Vol. 43 ›› Issue (5): 809-818.DOI: 10.6052/0459-1879-2011-5-lxxb2010-608

• Research paper • Previous Articles     Next Articles

Lattice boltzmann simulation of flow over a transversely oscillating circular cylinder

Shuai Gong1,Zhaoli Guo2   

  1. 1. Ministry of Education Key Laboratory of Power and Machinery, Shanghai Jiao Tong University, Shanghai 200240, China
    2. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2010-09-10 Revised:2010-11-11 Online:2011-09-25 Published:2011-09-27
  • Contact: Zhaoli Guo

Abstract: The lattice Boltzmann method (LBM) is used to simulate the incompressible flow past a transversely oscillating circular cylinder. Simulations are conducted at Reynolds number $Re=185$. The results show that as the oscillation frequency of the cylinder is increased relative to the natural vortex shedding frequency of the corresponding stationary cylinder, the initially formed concentration of vorticity moves closer to the cylinder until a limiting position reaches. At this point, the vorticity concentration abruptly switches to the opposite side of the cylinder. When the oscillation frequency is near the natural vortex shedding frequency of a corresponding stationary cylinder, frequency synchronization occurs. When the oscillation frequency is away from the natural vortex shedding frequency, frequency synchronization also disappears. In several subharmonic and superharmonic excitation situations, vortex shedding frequency in the near wake region also equals to the natural one of the corresponding stationary cylinder.

Key words:

lift and drag

CLC Number: