  This paper presents a sharp free surface method for fully nonlinear flow of
two immiscible phases for wave propagation problems in the Finite Volume
framework. The method resolves a sharp interface between two phases by
combining the geometric reconstruction Volume-of-Fluid scheme isoAdvector for
accurate advection of the free surface with the Ghost Fluid Method for the
consistent treatment of density and pressure gradient discontinuities at the
free surface. The method uses a compact computational stencil irrespective of
cell shape and is formally second-order accurate in time and space. The primary
focus of this work is to present the combined method and verify and validate it
for wave-related problems in ocean sciences, marine and coastal engineering, by
considering the following test cases: i) wave propagation of a two-dimensional
wave with moderate steepness, ii) green water (water-on-deck) simulations for a
ship model with violent free surface flow patterns. The method is implemented
in OpenFOAM, an open source software for Computational Fluid Dynamics.
