Abstract

In this article, a numerical model was obtained in a two dimensional flow pattern simulation around a groyne. The model approximates the depth-averaged, shallow water equations with a finite volume, semi-implicit and semi-Lagrangian representation. Runge-Kutta scheme was used for departure point determination. The results showed that numerical model has high stability and efficiency. Also, numerical representation has the ability to recognize land boundaries; therefore, closed boundaries do not need specification. The comparison between numerical formulation results and experimental results show that except in areas with strong downward flow, there are good agreements between experimental and calculated results.

Key words: Semi-Lagrangian, semi-implicit, shallow water, flow pattern, groyne.