International Journal of Ocean System Engineering

Korean Society of Ocean Engineers (한국해양공학회)
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Numerical Simulation of 3D Free-Surface Flows by Using CIP-based and FV-based Methods

  • Yang, Kyung-Kyu (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Nam, Bo-Woo (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Kim, Yong-Hwan (Department of Naval Architecture and Ocean Engineering, Seoul National University)
  • Received : 2010.06.01
  • Accepted : 2011.07.29
  • Published : 2011.09.01
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Abstract

In this paper, three-dimensional free-surface flows are simulated by using two different numerical methods, the constrained interpolation profile (CIP)-based and finite volume (FV)-based methods. In the CIP-based method, the governing equations are solved on stationary staggered Cartesian grids by a finite difference method, and an immersed boundary technique is applied to deal with wave-body interactions. In the FV-based method, the governing equations are solved by applying collocated finite volume discretization, and body-fitted meshes are used. A free-surface boundary is considered as the interface of the multi-phase flow with air and water, and a volumeof-fluid (VOF) approach is applied to trace the free surface. Among many variations of the VOF-type method, the tangent of hyperbola for interface capturing (THINC) and the compressive interface capturing scheme for arbitrary meshes (CICSAM) techniques are used in the CIP-based method and FV-based method, respectively. Numerical simulations have been carried out for dam-breaking and wave-body interaction problems. The computational results of the two methods are compared with experimental data and their differences are observed.

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