Author(s): K. S. Erduran; V. Kutija
Linked Author(s): Vedrana Kutija, Kutsi S. Erduran
Keywords: Shallow water; Navier Stokes; Flexible vegetation; Cantilever beam theory; Quasi three dimensional numerical model
Abstract: Numerical methods have been widely used to simulate free surface flows controlled by many factors. Vegetation is one of those factors and plays an important role particularly for river restoration and wetland projects. The main impact of vegetation on flow is that it causes drag, resulting in momentum losses. In this paper we introduce a quasi three dimensional (Q3D) numerical model which is suitable for both rigid and flexible vegetation. The model solves two dimensional shallow water equations by means of a finite volume method and the Navier Stokes equations by a finite difference method. The drag forces due to vegetation are included in both sets of equations. Cantilever beam theory is used to compute the deflection of the flexible vegetation. The model is applied to experimental data for rigid vegetation and artificial data are used to demonstrate the model ability for simulation of flexible vegetation.
Year: 2003