Abstract：Based on OpenFOAM software with k-ω SST turbulence model and 6 degree-of-freedom motion grid solver, three-dimension numerical simulations were conducted for a flow of subcritical region around one degree of freedom moving cylinder. The cylinder lift coefficient, drag coefficient, motion trajectory and flow solid coupling pattern were investigated under different initial flow fields. Using C++object oriented programming, the experimental data and theoretical analysis were compared to verify the reliability of the turbulence model and the calculation results. The calculation results show that structured mesh decomposition method and k-ω SST turbulence model are accurate to solve the problem of flow around a circular cylinder. The cylinder with the freedom perpendicular to the flow direction is unstable. The stability strength and the deviating direction are related to the initial flow state. The fluid solid coupling changes the frequency of lift coefficient and enhances the cylinder deviating.
李昌烽, 王力, 王宏宇, 刘彦峰, 李磊销. 单自由度刚性圆柱体绕流的不稳定性[J]. 江苏大学学报（自然科学版）, 2016, 37(1): 35-38.
LI Chang-Feng, WANG Li, WANG Hong-Yu, LIU Yan-Feng, LI Lei-Xiao. Unstability of flow around rigid circular cylinder with one degree of freedom[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2016, 37(1): 35-38.
2016, Vol. 37 
