Effect of Porosity on Oblique Wave Diffraction by Two Unequal Vertical Porous Barriers

Abstract

The diffraction of obliquely incident wave by two unequal barriers with different porosity in infinitely deep water is investigated by using two-dimensional linearized potential theory. Reflection and transmission coefficients are computed numerically using appropriate Galerkin approximations for two partially immersed and two submerged barriers. The amount of energy dissipation due to the permeable barriers is derived using Green’s integral theorem. The coefficient of wave force is determined using the linear Bernoulli equation of dynamic pressure jump on the porous barriers. The numerical results of hydrodynamics quantities are illustrated graphically.

Keywords

Water wave scattering / Galerkin approximation / Porosity / Two unequal barriers / Reflection and transmission coefficients