Seakeeping Sensitivity Studies Using the Decomposition CFD Model Based on the Ghost Fluid Method (original) (raw)

2016

Abstract

This work presents various seakeeping sensitivity studies performed with a novel CFD model based on solution and domain decomposition and the implicit treatment of free surface jump conditions via the Ghost Fluid Method (GFM). Solution decomposition via Spectral Wave Explicit Navier–Stokes Equations (SWENSE) allows us to efficiently simulate incident wave propagation, while domain decomposition via implicit relaxation zones prevents undesirable wave reflection off far field boundaries. The GFM discretises the pressure jump conditions, yielding interface–corrected interpolation schemes, which implicitly couple the two fluids at the free surface. In order to capture the interface, implicitly redistanced Level Set (LS) method derived from the Phase Field (PF) equation is used, rendering additional explicit redistancing unnecessary. The combined model is implemented in foam-extend-3.2, a community driven fork of the open source software OpenFOAM. Validation of the model is performed by ...

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