Author(s): Chiang-An Hsu
Linked Author(s):
Keywords: Two-dimensional shallow water equations; Dam break flows; Finite volume method; TVD shock-capturing scheme; Structured and unstructured mesh
Abstract: A computer package, named SEC-HY21, integrating a hydrodynamic model solving the depth-averaged two-dimensional shallow water equations and associated graphical user interface (GUI) tools for mesh and bed topology generation, model data preparation, and flow visualization was developed. Currently, two numerical models are embedded in this software. The framework of the solution engine is based on the shock-capturing cell-centered finite volume upwind TVD method. The first one use of the structured quadrilateral mesh with multi-block capacity was developed and with many applications for years, and the second one using edge-based unstructured mesh is recently developed. In this paper, applications using these two models to two-dimensional dam-break flows in open channels are presented. The simulated results are compared with corresponding experimental data, which show good agreement and demonstrate the presented models are capable of simulating unsteady discontinuous flow conditions on irregular domains with complex bed topography.
Year: 2005