In this paper,numerical simulation is conducted via our in-house solver,vim-FOAM-SJTU,developed on open-source software,OpenFOAM.Flow around static rigid cylinders and elastically mounted rigid cylinder constrained to free stream with free end are numerically investigated.Some significant conclusions are made by analyzing the different results between cases with and without free end.The turbulence model is implemented with a shear stress transport-based(SST-based)improved delayed detached eddy simulation(IDDES)approach in the vim-FOAM-SJTU.Firstly,The paper starts with the application of the vim-FOAM-SJTU solver to flow past fixed cylinder with free end at Reynolds number 43 000.The numerical results are compared with experimental data.Comparison are satisfactory which implies the validity and accuracy of the current computational fluid dynamics(CFD)solver.The flow visualization in the vicinity of free-end is discussed.Subsequently,the solver is utilized to simulate the free end effect associated with the VIM of a cylinder submerged in current.The motion responses under different inflow velocities are studied.The relationship between transverse motion frequency,in-line motion frequency is discussed.Lastly,the effect of the free end on the vortex of the wake field is analyzed by comparing the 3-D vorticity diagrams of the free end cylinder.The responses of circular cylinder with or without free end are compared.

Jia-wei He;Wei-wen Zhao;De-cheng Wan;Yi-qian Wang

Computational Marine Hydrodynamics Lab(CMHL),School of Naval Architecture,Ocean and Civil Engi-neering,Shanghai Jiao Tong University,Shanghai 200240,China;Ocean College,Zhejiang University,Zhoushan 316021,China;School of Mathematical Science,Soochow University,Suzhou 215006,China

水动力学研究与进展B辑

[1]Jia-wei He;Wei-wen Zhao;De-cheng Wan;Yi-qian Wang-.Numerical study of free end effect of cylinder with low aspect ratios on vortex induced motion)[J].水动力学研究与进展B辑,2022(01):106-115

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