Hydraulic performance and wave loadings of perforated/slotted coastal structures: A review

▪ Abstract This article reviews the use of Darcy's law for analyzing waves moving past a porous structure. The engineering applications of these analyses are emph asized. The first part of the article studies theories on the effect of a porous structure on incoming wave trains. It also reviews the movement of waves past a plate with regular gaps in it in an attempt to compare the results of potential theory with those of Darcy's law. The second part reviews the use of a porous structure as a wavemaker when the structure is subject to horizontal oscillation. The third part extends the theories to the use of a porous structure as a breakwater in a two-dimensional harbor. The effect of the structure on reducing waves and suppressing harbor resonance is investigated.

Interaction between porous media and wave motion

The present paper aims at getting the porous effect parameter G of a thin permeable wall. The reflection and transmission coefficients of a thin vertical porous wall with different porous shapes an...

Porous effect parameter of thin permeable plates

Wave interaction with a perforated wall breakwater with a submerged horizontal porous plate

The present paper describes a theoretical analysis and an associated numerical model used to assess the performance of a breakwater consisting of a perforated front wall, an impermeable back wall, and a rock-filled core. The numerical method is based on an eigenfunction expansion and utilizes a boundary condition at the perforated wall that accounts for energy dissipation. The numerical model is validated by comparison with previous numerical studies of the limiting cases of a permeable seawall and a perforated breakwater with an impermeable back wall. Relevant numerical results that are presented relate to the reflection coefficient, the wave runup, and the wave force. The effects of porosity, breakwater geometry, and relative wavelength are discussed; the choice of suitable parameters needed to model the permeability of the breakwater is described; and an example application to a practical design situation is given.

G. E. Jarlan

Papers

A perforated vertical wall breakwater