A coupled numerical model for water flow, sediment transport and bed erosion

Liu, Xin1; Beljadid, Abdelaziz2

2017-09

10.1016/j.compfluid.2017.06.013

COMPUTERS & FLUIDS   影响因子和分区

0045-7930

1879-0747

In this paper, we propose an accurate Riemann-solver free method for a coupled system modeling shallow water flows, sediment transport and rapid bed erosion. The hydrodynamic model solving shallow water equations (SWEs) is coupled with the sediment transport equation and the morphodynamic model. A Godunov-type central-upwind scheme is proposed to numerically solve the resulting system based on the technique that using two different pairs of local wave speeds to estimate numerical fluxes for hydrodynamic and morphodynamic models, respectively. The proposed technique leads to accurate results for the computation of the morphodynamic model. The proposed scheme is based on computationally efficient techniques and do not require analytical expressions of the eingenstructure of the system. A well-balanced discretization of the bed-slope terms is developed in framework of the coupling approach. Finally, we demonstrate the robustness and accuracy of the proposed numerical scheme for the coupled system using several numerical tests. (C) 2017 Elsevier Ltd. All rights reserved.

Coupled model Shallow water equations Central-upwind method Bed-load transport Finite-volume method Lagrange theorem

SCI ; EI

英语

第一

Computer Science ; Mechanics

Computer Science, Interdisciplinary Applications ; Mechanics

WOS:000407984800021

PERGAMON-ELSEVIER SCIENCE LTD

20172603812043

Computation theory ; Equations of motion ; Erosion ; Finite volume method ; Hydraulics ; Sediment transport ; Sedimentation

Liquid Dynamics:631.1.1 ; Hydraulics:632.1 ; Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory:721.1 ; Chemical Operations:802.3 ; Calculus:921.2 ; Numerical Methods:921.6

COMPUTER SCIENCE

Web of Science

1.Southern Univ Sci & Technol China, Shenzhen 518055, Peoples R China
2.MIT, 77 Massachusetts Ave,Bldg 1, Cambridge, MA 02139 USA

Liu, Xin,Beljadid, Abdelaziz. A coupled numerical model for water flow, sediment transport and bed erosion[J]. COMPUTERS & FLUIDS,2017,154:273-284.

Liu, Xin,&Beljadid, Abdelaziz.(2017).A coupled numerical model for water flow, sediment transport and bed erosion.COMPUTERS & FLUIDS,154,273-284.

Liu, Xin,et al."A coupled numerical model for water flow, sediment transport and bed erosion".COMPUTERS & FLUIDS 154(2017):273-284.