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Simulation of Reflective Boundaries Using the Sponge Layer in Boussinesq Wave Propagation Model  

Chun, In-Sik (Department of Civil and Engineering, Konkuk University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.19, no.5, 2007 , pp. 429-435 More about this Journal
Abstract
The present study proposed a method fer simulating reflective boundary conditions in Boussinesq wave propagation model by lining lateral boundaries like breakwaters and seawalls with artificial sponge layers. In order to find out the reflective characteristics of sponge layers, 1D numerical experiments were performed varying the relative sponge width (sponge width/wave length). The results showed that the reflection coefficient can be effectively realized from no reflection to full reflection simply by adjusting the relative sponge width. Based on the results, a multiple regression formula was proposed to delineate the relationship among the reflection coefficient and other dimensionless variables. Finally, the reflective sponge layer was applied to a semi-infinite breakwater, demonstrating that it can also be successfully employed in 2D applications.
Keywords
Boussinesa model; sponge layer; reflective boundary; relative sponge width; reflection coefficient; semi-infinite breakwater;
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Times Cited By KSCI : 2  (Citation Analysis)
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