Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2021 , Vol. 55 >Issue 1: 1 - 10

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2020.99.015

Numerical Wave Simulation Using Geometrical VOF Method Based on OpenFOAM

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  • 1.State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2.Natural Marine Hazard Mitigation Service, Beijing 100194, China
    3.Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China

Received date: 2019-09-17

  Online published: 2021-01-19

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Abstract

Numerical wave simulation is a significant research topic. In this paper, the open source computational fluid dynamics (CFD) platform, OpenFOAM, is utilized to simulate Stokes fifth-order waves. Since geometrical volume-of-fluid (VOF) could better capture free surface due to its geometrical reconstruction step, the free surface simulations are accomplished by applying OpenFOAM built-in geometrical VOF method-isoAdvector, and the relaxation zone scheme is introduced through secondary development for wave absorption. The mesh density and Courant number convergence analyses with geometrical VOF are conducted. The simulation shows that satisfactory results could be obtained with a large Courant number. The algebraic and geometrical VOF simulated data with respect to wave elevation and phase at varied wave steepnesses and frequencies are recorded and compared with the theoretical value of Stokes fifth-order waves, which demonstrates that geometrical VOF is better than algebraic VOF in the prediction of wave elevation. Finally, the lengths and weights of the wave absorption zone are discussed, and the results imply that the best practice for the wave absorption is assigning the wave absorption zone length at least two times of the wave length along with applying exponential weight distribution.

Key words： OpenFOAM; geometrical volume-of-fluid (VOF); Stokes fifth-order waves; relaxation zone scheme

Cite this article

TIAN Kang, ZHANG Yao, LI Jinlong, ZHANG Xinshu, YOU Yunxiang . Numerical Wave Simulation Using Geometrical VOF Method Based on OpenFOAM[J]. Journal of Shanghai Jiaotong University, 2021 , 55(1) : 1 -10 . DOI: 10.16183/j.cnki.jsjtu.2020.99.015

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