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A Numerical Study of Wave Transformation on a Permeable Structure Considering Porous Media Flow  

Kim, In-Chul (Division of Architecture and Civil Engineering, Dongseo University)
Publication Information
Journal of Ocean Engineering and Technology / v.20, no.6, 2006 , pp. 35-40 More about this Journal
Abstract
In recent years, there's been strong demand for seawalls that havea gentle slope and permeability that serveswater affinity and disaster prevention from wave attack. The aim of this study is to examine wave transformation, including wave run-up that propagates on the coastal structures. A numerical model based on the weak nonlinear dispersive Boussinesq equation, together with the unsteady nonlinear Darcy law for fluid motion in permeable layer, is developed. The applicability of this numerical model is examined through Deguchi and Moriwaki's hydraulic model test on the permeable slopes. From this study, it is found that the proposed numerical model can predict wave transformation and run-up on the gentle slope with a permeable layer, but can't show accurate results for slopes steeper than about 1:10.
Keywords
Wave transfortation; Boussinesq equation; Darcy law; Wave runup; Permeable layer; Gentle slope;
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