Author(s): Alex George Mutasingwa; Shoji Fukuoka; Akihide Watanabe
Linked Author(s): Alex George Mutasingwa, Akihide Watanabe, Shoji Fukuoka
Keywords: Unsteady flow; Compound meandering channel and numerical
Abstract: While numerous steady compound channel flow studies have been conducted, unsteady compound channel flow has received relatively little attention. This paper presents a comparison between 2-dimensional unsteady flow numerical model and experimental results for flow variables in a compound meandering channel. Extensive flood flow experimental data obtained from a compound meandering channel experiments in the Hydraulic Laboratory, Hiroshima University is used for comparison with the numerical model. The numerical method is based on a finite volume discretization on a staggered grid with upwind scheme in flux, it handles drying and wetting process for a flood plain, has the ability to handle complex geometry and discontinuities, which are the main requirements for modeling compound channel flows. Comparison between measured data and model simulations show generally good agreement. This shows how useful the model can be in prediction of flood propagation in channels.
Year: 2001