— When considering the interaction of waves with a conventional submerged breakwater, the inciden... more — When considering the interaction of waves with a conventional submerged breakwater, the incident wave energy can be split into: a reflected fraction; a dissipated fraction, due to the wave breaking and the friction losses on it; and a transmitted fraction to the shore. If the submerged breakwater embeds a wave energy absorption device, a further reduction of the transmitted energy can be achieved, improving the coastal protection performance of the structure. This is the case of the REWEC1, which is a submerged breakwater embedding an OWC device designed for operating under resonance flow conditions with the most probable sea state of a specific site. In this work, a CFD approach has been used in order to evaluate the response, in terms of reflection and transmission coefficients, of these submerged breakwater systems operated inside a wave flume, under regular waves generated by a piston type wave maker. The water-air interaction is taken into account by means of the Volume Of Fluid (VOF) model implemented in the commercial CFD code Ansys Fluent. Both air and water flow fields are assumed to be unsteady and are computed solving the RANS equations. The results confirm a reduction of the transmission coefficient in the case of the REWEC1.
— When considering the interaction of waves with a conventional submerged breakwater, the inciden... more — When considering the interaction of waves with a conventional submerged breakwater, the incident wave energy can be split into: a reflected fraction; a dissipated fraction, due to the wave breaking and the friction losses on it; and a transmitted fraction to the shore. If the submerged breakwater embeds a wave energy absorption device, a further reduction of the transmitted energy can be achieved, improving the coastal protection performance of the structure. This is the case of the REWEC1, which is a submerged breakwater embedding an OWC device designed for operating under resonance flow conditions with the most probable sea state of a specific site. In this work, a CFD approach has been used in order to evaluate the response, in terms of reflection and transmission coefficients, of these submerged breakwater systems operated inside a wave flume, under regular waves generated by a piston type wave maker. The water-air interaction is taken into account by means of the Volume Of Fluid (VOF) model implemented in the commercial CFD code Ansys Fluent. Both air and water flow fields are assumed to be unsteady and are computed solving the RANS equations. The results confirm a reduction of the transmission coefficient in the case of the REWEC1.
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