Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Development of WMLS-based Particle Simulation Method for Solving Free-Surface Flow

자유표면 유동해석을 위한 WMLS 기반 입자법 기술 개발

  • 남정우 (STX조선해양(주), 조선기술본부) ;
  • 박종천 (부산대학교 조선해양공학과) ;
  • 박지인 (한국해양과학기술원 선박해양플랜트연구소) ;
  • 황성철 (부산대학교 조선해양공학과) ;
  • 허재경 (DNV-GL 소프트웨어) ;
  • 정세민 (대우조선해양(주) 중앙연구원)
  • Received : 2014.02.03
  • Accepted : 2014.04.15
  • Published : 2014.04.30
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Abstract

In general, particle simulation methods such as the MPS(Moving Particle Simulation) or SPH(Smoothed Particle Hydrodynamics) methods have some serious drawbacks for pressure solutions. The pressure field shows spurious high fluctuations both temporally and spatially. It is well known that pressure fluctuation primarily occurs because of the numerical approximation of the partial differential operators. The MPS and SPH methods employ a pre-defined kernel function in the approximation of the gradient and Laplacian operators. Because this kernel function is constructed artificially, an accurate solution cannot be guaranteed, especially when the distribution of particles is irregular. In this paper, we propose a particle simulation method based on the moving least-square technique for solving the partial differential operators using a Taylor-series expansion. The developed method was applied to the hydro-static pressure and dam-broken problems to validate it.

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References

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