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Numerical Simulation of Water Entry with Improved SPH Method

J. R. Shao

College of Mechanical Engineering, Chongqing University of Technology, No. 69 Hongguang Road, Chongqing, P. R. China

E-mail Address: shaojiaru@cqut.edu.cn

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Y. Yang

College of Mechanical Engineering, Chongqing University of Technology, No. 69 Hongguang Road, Chongqing, P. R. China

E-mail Address: yangyu_2014@cqut.edu.cn

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H. F. Gong

College of Mechanical Engineering, Chongqing University of Technology, No. 69 Hongguang Road, Chongqing, P. R. China

E-mail Address: ghfpy@cqut.edu.cn

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, and

M. B. Liu

College of Engineering, Institute of Ocean Research, State Key Laboratory for Turbulence and Complex Systems, Peking University, No. 5, Yiheyuan Road, Beijing, P. R. China

E-mail Address: mbliu@pku.edu.cn

Corresponding author.

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https://doi.org/10.1142/S0219876218460040Cited by:16 (Source: Crossref)

This article is part of the issue:

Special Issue: SPHERIC Beijing 2017; Guest Editor: Moubin Liu

Abstract

Water entry problems are very common in engineering and sciences. When objects move with relatively high speed, bubble cavities will be generated, and the behavior of moving objects will also be affected conversely. In this paper, the water entry problems are studied using smoothed particle hydrodynamics (SPH) method, which has special advantages in modeling free surfaces, moving interfaces. First, an improved fluid–solid interface treatment algorithm is presented, whose effectiveness is validated by a water entry of a buoyant cylinder. Then the water entry with different velocities and directions are researched. It is found that the velocities and angles of the moving objects will affect the movement of the object greatly, and the SPH model can give optimal predication of these corresponding conditions.

Keywords:

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