Abstract
Fully nonlinear oblique waves are reproduced in a circular wave basin using a viscous three-dimensional numerical model based on the two-phase flow model. The numerical model is conducted in cylindrical coordinates and the finite volume method (FVM) is used to discretize the Navier–Stokes equations on the zonal embedded grids. The free surface is captured using the volume of fluid (VOF) method. Oblique waves are generated by a wave generator inside the computational domain, which is implemented by adding a source term to the continuity equation. The outgoing waves are numerically dissipated by an artificial damping zone at the outer edge of the circular wave basin.To demonstrate the advantages of the present model, numerical simulations of oblique incident waves are carried out, and the results for the regular waves are compared with the theoretical results. It is found that the effective area in the circular wave basin is significantly enlarged and its performance rarely depends on the incident angle of the oblique waves. In addition, by integrating the mass function of the oblique waves, this model can be used to simulate multi-directional waves. In this paper, this method is used to simulate two crossed waves.
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