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A two-phase numerical model for suspended-sediment transport in estuaries |
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| Authors: | Kim Dan Nguyen Sylvain Guillou Julien Chauchat Nathaly Barbry |
| Institution: | 1. Laboratory of Continental and Coastal Morphodynamics, UMR CNRS 6143, University of Caen, Campus II, F-14034 Caen Cedex, France;2. Laboratoire Universitaire des Sciences Appliquées de Cherbourg (LUSAC) EA 2607, University of Caen, Site universitaire de Cherbourg, BP78, 50130 Cherbourg - Octeville, France;3. Laboratoire de Génie Civil et Mécanique (GeM), UMR CNRS 6183/Université de Nantes, 58 rue Michel Ange, F-44600 Saint-Nazaire Cedex, France;4. Saint-Venant Laboratory for Hydraulics, Joint-Research Unit of CETMEF, EDF R&D and ENPC, 6 Quai Wattier, 78400 Chatou, France |
| Abstract: | This paper presents a full 2-D X/Z numerical model for sediment transport in open channels and estuaries using a two-phase (fluid–solid particle) approach. The physical concept and the mathematical background of the model are given and test-cases have been carried out to validate the proposed model. In order to illustrate its feasibility for a real estuary, the model has been applied to simulate the suspended-sediment transport and the formation of turbidity maximum in the Seine estuary. The numerical results show that the main characteristics of estuarine hydro-sediment dynamics in the Seine estuary are in fact reproduced by the proposed model. A qualitative agreement between the numerical results and the actual observations has been obtained and is presented in this paper. |
| Keywords: | Numerical modelling Two-phase fluid-particle modelling Sediment transport Estuary |
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