Two-Dimensional Dam-Break Flood Simulation on Unstructured Meshes
Parallel and Distributed Computing, Applications and Technologies（2010）
摘要
A two-dimensional dam-break flood simulation model using unstructured meshes has been developed to study the hydrodynamics of flooding processes. The model employs the finite volume method to solve the conservation form of the shallow water equations. The HLLC approximate Riemann solver is used for computing the fluxes at cell interfaces because of its easiness to implement and suitability to wet/dry treatment. A second-order spatial accuracy is achieved by implementing MUSCL reconstruction technique. The model utilizes two-step TVD Runge-Kutta method for time stepping to achieve second-order accuracy in time. In addition to the model formulation, this paper presents the model verifications and validations against analytical solutions and benchmark problem for an oblique hydraulic jump test cast and 2D partial dam-break problem, respectively. The results show that the model can correctly account for the two-dimensional dam-break floods with respect to its effectiveness and robustness thus has bright application prospects.
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关键词
finite volume method,dam break,finite volume methods,two-step tvd runge-kutta method,two-dimensional dam-break flood,unstructured,unstructured meshes,dams,mesh generation,shallow water equations,tvd runge-kutta method,model formulation,muscl reconstruction technique,partial dam-break problem,second-order accuracy,runge-kutta methods,two-dimensional dam-break flood simulation,hllc approximate riemann solver,oblique hydraulic jump test cast,hydrodynamics,digital simulation,two dimensional dam-break flood simulation,public utilities,model verification,benchmark problem,floods,second-order spatial accuracy,analytic solution,accuracy,shallow water equation,runge kutta method,solid modeling,hydraulic jump,mathematical model,second order,computational modeling,runge kutta methods,simulation model
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