Numerical simulation of vortex-induced vibration of cylinder based on improved turbulence model

作者：Kang, Zhuang; Zhang, Cheng^*; Zhang, Lijian; Jia, Wuyang

来源：Journal of Harbin Engineering University, 2018, 39(5): 837-844.

DOI：10.11990/jheu.201702023

• Acceleration condition
• Flow around a cylinder
• Hysteresis phenomenon
• Initial conditions
• Shear-stress transport
• Two degrees of freedom
• Vortex induced vibration
• Vortex-shedding modes

To accurately simulate the lift and drag of a cylinder undergoing vortex-induced vibration, we improved the shear stress transport (SST) turbulence model and verified the correctness of the improved model with respect to the flow around the cylinder. Using the OpenFoam embedded program, we performed a numerical simulation of the vortex-induced vibration of a cylinder with two degrees of freedom under three different initial conditions. Comparisons and analyzes of the vibration amplitude, lock-in section, fluid force, motion locus, and vortex shedding characteristics in these three initial conditions revealed some differences in the results with respect to the three initial conditions. The results obtained under even acceleration conditions were more accurate. In addition, the mutation of the vortex shedding mode resulted in the mutation of the amplitude branch, and we found the inertia of vortex shedding to be an inherent reason for the "hysteresis phenomenon".

• 出版日期2018
• 单位哈尔滨工程大学