Numerical investigation of vortex-induced motions of a circular cylinder with free surface

Songtao Chen, Weiwen Zhao, Decheng Wan, Changhong Hu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of the 31st International Ocean and Polar Engineering Conference, ISOPE 2021
PublisherInternational Society of Offshore and Polar Engineers
Pages2008-2014
Number of pages7
ISBN (Print)9781880653821
Publication statusPublished - 2021
Event31st International Ocean and Polar Engineering Conference, ISOPE 2021 - Virtual, Online
Duration: Jun 20 2021Jun 25 2021

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Conference

Conference31st International Ocean and Polar Engineering Conference, ISOPE 2021
CityVirtual, Online
Period6/20/216/25/21

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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