Author(s): Xiping Yu; Zengnan Dong
Linked Author(s): Zengnan Dong
Keywords: Water-waves; Maritime structure; Numerical method
Abstract: A numerical method for direct computation of wave interactions with a submerged plate is described. Both solid and porous plates are considered. The solid plate is treated as a special case of the porous plate with vanishing porosity. The governing equations of the problem are the continuity equation and the Navier-Stokes equations formulated for flows in porous media but reduce to represent ordinary flows by properly determining the porous parameters. Decoupling of the velocity and the pressure in the numerical scheme follows the classical SMAC method. k-model is employed to deal with the turbulence-induced diffusion of momentum. The VOF function is introduced to describe the free surface. The free-surface capturing in numerical computations is realized through solving the advection equation for the VOF function by donor-acceptor method. Finite volume method is employed for spatial descretization. The computational results demonstrate the existence of downward and upward jets at the downwave end of the plate at particular phases. Formation of clockwise vortex right below the downwave end of the plate is also identified. The plate porosity is found to have negative effects on wave control.
Year: 2001