Depth Averaged Modelling of Turbulent Shallow Water Flow with Wet-Dry Fronts

Abstract

Depth averaged models are widely used in engineering practice in order to model environmental flows in river and coastal regions, as well as shallow flows in hydraulic structures. This paper deals with depth averaged turbulence modelling. The most important and widely used depth averaged turbulence models are reviewed and discussed, and a depth averaged algebraic stress model is presented. A finite volume model for solving the depth averaged shallow water equations coupled with several turbulence models is described with special attention to the modelling of wet-dry fronts. In order to asses the performance of the model, several flows are modelled and the numerical results are compared with experimental data.

Efficient numerical computation and experimental study of temporally long equilibrium scour development around abutment

“…The model shows great success in representing a wide range of complicated sediment transport and fluvial processes, such as presented in the studies of Cao et al [16], Wu and Wang [17,18], Xia et al [19], and Cao and Pender [20]. For the employed SWEs model to simulate the turbulence abutment bed scouring, the sediment transport continuity-concentration (SCC) model was used by adapting the non-capacity concept used in Cao et al [16] and Cao and Pender [20]; whereas the flow turbulence was simulated by a standard 2D k- model used in Younus and Chaudhry [21] and Cea et al [22]. The full model of this study was constructed by the fully coupled concept, and it was based on the finite volume (FV) method.…”

Two-Dimensional Dam-Break Flood Analysis in Data-Scarce Regions: The Case Study of Chipembe Dam, Mozambique

“…This Godunov type scheme is especially suitable for simulating dam-break flows, which often involve flow discontinuities and changes in flow regime. Several RANS type turbulence models are implemented in the model Iber [48]. In this case, the k-ε model from Rastogi and Rodi [49] was chosen.…”

Simulación numérica de inundaciones en Villahermosa México usando el código IBER

“…En esta situación la frontera del dominio se debe mover adecuadamente, para incluir todas las celdas que están en el frente de seco mojado. Un tratamiento adecuado del movimiento de estas fronteras es necesario para obtener resultados precisos y que conserven la masa (Brufau et al, 2000;Castro et al, 2005;Cea et al, 2007).…”