Violent Free Surface Flow Simulations by a Coupled Level-Set and Volume-of-Fluid Method in Overset Grid Systems
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2014 The International Society of Offshore and Polar Engineers. We present a coupled level-set (LS) and volume-of-fluid (VOF) method for time-domain simulation of violent free surface flows in an overset grid system. The advection of the VOF function is performed by using a mixed second-order Eulerian and Lagrangian scheme with a piecewise linear interface calculation (PLIC). A volume correction scheme is implemented to compensate for the mass change and to maintain a divergence-free velocity field. The LS function is solved by using a fifth-order Weighted Essentially Non-Oscillatory (WENO) scheme. The coupled level-set and volume-of-fluid (CLSVOF) interface-capturing method is employed in conjunction with the Finite-Analytic Navier-Stokes (FANS) method for violent free surface flow problems. Moreover, a chimera domain decomposition approach is implemented by using an overset grid system, including embedding and overlapping grids for accurate resolution of flow around structures. The simulation results demonstrate the capability of the CLSVOF method in an overset grid system for violent free surface flow problems.
INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING
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Zhao, Yucheng||Chen, Hamn-Ching