Perfomance of free surface capturing methods in the wave absorption

Resumo

Different numerical methodologies provided in the literature, associated to Computational Fluid Dy-
namics (CFD), are applied to generation and absorption of marine waves into a Numerical Wave Tank (NWT)

model. However, when the user configures this problem in CFD, it is necessary to select the most appropriate
numerical model to represent the physical phenomenon of wave motion. A standard framework for numerical
modeling is the OpenFOAM software and its two-phase solvers as InterFoam and InterIsoFoam, which allow an
adequate simulation for a wide range of marine hydrodynamic problems. A very common issue that appears in
NWTs is the low capacity of absorption of the marine waves at the inlet and outlet into the numerical models.
An efficient absorption of these waves is important to guarantee the open ocean conditions and to minimize the
error associated with the numerical results. In order to mitigate the wave reflections, a numerical study of the
convergence parameters applied to two-phase solvers was carried out and an analyse of the waves generation and
absorption was performed. The present study allowed to evaluate the hydrodynamic interface treating methods
avaiable in OpenFOAM and foster a discussion of the already established methods.