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http://dx.doi.org/10.9765/KSCOE.2017.29.6.326

Numerical Simulation of Wave Overtopping on a Porous Breakwater Using Boussinesq Equations  

Huynh, Thanh Thu (Department of Civil & Environmental Engineering, Sejong University)
Lee, Changhoon (Department of Civil & Environmental Engineering, Sejong University)
Ahn, Suk Jin (Research Institute, GeoSystem Research Corporation)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.29, no.6, 2017 , pp. 326-334 More about this Journal
Abstract
We obtain height of waves overtopping on a porous breakwater using both the one-layer and two-layer Boussinesq equations. The one-layer Boussinesq equations of Lee et al. (2014) are used and the two-layer Boussinesq equations are derived following Cruz et al. (1997). For solitary waves overtopping on a porous breakwater, we find through numerical experiments that the height of waves overtopping on a low-crested breakwater (obtained by the Navier-Stokes equations) are smaller than the height of waves passing through a high-crest breakwater (obtained by the one-layer Boussinesq equations) and larger than the height of waves passing through a submerged breakwater (obtained by the two-layer Boussinesq equations). As the wave nonlinearity becomes smaller or the porous breakwater width becomes narrower, the heights of transmitting waves obtained by the one-layer and two-layer Boussinesq equations become closer to the height of overtopping waves obtained by the Navier-Stokes equations.
Keywords
Boussinesq equations; Navier-Stokes equations; porous breakwater; overtopping; numerical experiment;
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