Experimental Tests and Numerical Modeling of Submerged Wave Attenuators Made of Cages Filled with Oyster Shells in Shallow Water
Résumé
In order to reduce wave agitation in shallow-water coastal or lagoon areas, dissipative submerged porous structures made of parallelepipedic metallic cages filled with used oyster shells (COS) are considered. The present study combines an experimental study in an hexapod facility to determine the parameters which best characterize these COS units considered as an homogeneous porous medium. Various numerical modeling strategies are then considered to simulate the propagation of monochromatic waves over a series of such COS devices in water of variable depth. Finally, the results from these models are compared with an independent series of experiments performed in a wave flume with the same COS. Overall, a fair agreement is obtained from these models regarding wave height attenuation and transmission for a range of relative water depth conditions and various relative heights of the COS structures relative to the water depth.
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