TY - GEN
T1 - Numerical investigation of vortex-induced motions of a circular cylinder with free surface
AU - Chen, Songtao
AU - Zhao, Weiwen
AU - Wan, Decheng
AU - Hu, Changhong
N1 - Funding Information:
This work is supported by the National Key Research and Development Program of China (2019YFB1704200, 2019YFC0312400), and the National Natural Science Foundation of China (51879159), to which the authors are most grateful.
Publisher Copyright:
© 2021 by the International Society of Offshore and Polar Engineers (ISOPE).
PY - 2021
Y1 - 2021
N2 - The vortex-induced motions (VIM) of bluff bodies and multi-column structures has been studied extensively through experiments and numerical simulations. Nevertheless, most numerical simulations ignore the existence of free surface and treat it as a rigid plane using boundary conditions. The objective of this paper is to investigate the effect of free surface on VIM for the Reynolds number covering 1.0×105 < Re < 1.6×105. The two degree-of-freedoms (DOF) vortex-induced motions of a circular cylinder with and without free surface are investigated with our in-house solver naoe-FOAM-SJTU. The Delay Detached-Eddy Simulation (DDES) approach is used to simulate the turbulent flow. To capture the free surface, the Piecewise Linear Interface Calculation (PLIC) which is a geometric Volume of Fluid (VOF) method is adopted. The results show that the free surface has major effects on the in-line motion amplitude, transverse oscillation frequency and motion trajectory, which cannot be ignored.
AB - The vortex-induced motions (VIM) of bluff bodies and multi-column structures has been studied extensively through experiments and numerical simulations. Nevertheless, most numerical simulations ignore the existence of free surface and treat it as a rigid plane using boundary conditions. The objective of this paper is to investigate the effect of free surface on VIM for the Reynolds number covering 1.0×105 < Re < 1.6×105. The two degree-of-freedoms (DOF) vortex-induced motions of a circular cylinder with and without free surface are investigated with our in-house solver naoe-FOAM-SJTU. The Delay Detached-Eddy Simulation (DDES) approach is used to simulate the turbulent flow. To capture the free surface, the Piecewise Linear Interface Calculation (PLIC) which is a geometric Volume of Fluid (VOF) method is adopted. The results show that the free surface has major effects on the in-line motion amplitude, transverse oscillation frequency and motion trajectory, which cannot be ignored.
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M3 - Conference contribution
AN - SCOPUS:85115277630
SN - 9781880653821
T3 - Proceedings of the International Offshore and Polar Engineering Conference
SP - 2008
EP - 2014
BT - Proceedings of the 31st International Ocean and Polar Engineering Conference, ISOPE 2021
PB - International Society of Offshore and Polar Engineers
T2 - 31st International Ocean and Polar Engineering Conference, ISOPE 2021
Y2 - 20 June 2021 through 25 June 2021
ER -