Simulation of Turbulent Flows in River Confluences and Meandering Channels with a Cartesian 3D Free Surface Hydrodynamic Model
Simulation de flux turbulents en confluences fluviales et canaux avec méandres avec un modèle hydrodynamique cartesian en 3D de surface libre
Ramón, C. L. ; Prats, J. ; Rueda, F. J.
Type de document
Article de revue scientifique à comité de lecture
Affiliation de l'auteur
WATER RESEARCH INSTITUTE UNIVERSITY OF GRANADA ESP ; IRSTEA AIX EN PROVENCE UR HYAX FRA ; WATER RESEARCH INSTITUTE UNIVERSITY OF GRANADA ESP
Résumé / Abstract
Three-dimensional primitive equations (3DPE) become a reasonable approach in hydrodynamics in terms of computational costs when the length of the computational domain and/or computational time scales increases. However, given the simplified set of equations used in the analysis, results with 3DPE-based models are expected to be approximate and before attempting to reproduce complex natural flows they first need to be validated against more simple flows observed in laboratory settings. Here, the validity of Cartesian free-surface hydrodynamic models to reproduce three turbulent flows characteristic of river environments is tested: (1) the development of shallow mixing layers, (2) flow pass a lateral cavity and (3) flow in open channel with mild curvature. Errors between measured and modelled values were generally less than 10%, proving their validity to reproduce such turbulent flows and their potential for simulations in more complex natural environments, such it is the case of the confluence between the Ebro and Segre rivers into Ribarroja reservoir.
International Journal of Computational Methods, vol. 12, num. 6, 35 p.