Parallel quasi-three dimensional finite element method for shallow water flows utilizing the mode splitting technique

This paper presents a parallel finite-element method for the analysis of quasi-three-dimensional shallow water flow. The sigma coordinate (generalized coordinate) is employed to treat the real configuration of the water depth. For the preprocessing of the parallel implementation, the automatic domain decomposer which is able to apply to the unstructured grid is employed. The tidal flow of Tokyo Bay is simulated for a numerical example. The speedup ratio and the efficiency of the parallelization are investigated. The present method is shown to be a useful and powerful tool for the large scale computation of quasi-three-dimensional shallow water flows.