A One-Dimensional Integral Equation for a Porous Horizontal Disc under Water Waves

Wave scattering by a thin, porous circular plate submerged in deep water is investigated.

The problem is formulated as a second-kind hypersingular Fredholm integral equation over the unit disk, solved numerically using the Boundary Element Method.

The analysis focuses on calculating hydrodynamic forces, specifically added mass (real part) and damping coefficient (imaginary part).

Results demonstrate the influence of the porosity parameter G: less porous plates (G real) increase added mass and hydrodynamic force, while more porous plates (G imaginary) reduce these effects but increase the damping coefficient.

The proposed formulation is validated, showing excellent agreement with established literature.