Parallelisation of a finite volume method for hydrodynamic inundation modelling

Stephen Gwyn Roberts, Linda Stals, Ole Moller Nielsen


Geoscience Australia and the Australian National University are
developing a hydrodynamic inundation modelling tool called \AnuGA{}
to help simulate the impact of natural inundation hazards such as
riverine flooding, storm surges and tsunami. The core of \AnuGA{} is
a \Python{} implementation of a finite-volume method based on
triangular meshes for solving the conservative form of the Shallow
Water Wave equation. We describe the parallelisation of the code
using a domain decomposition strategy where we use the \Metis{}
graph partitioning library to decompose the finite volume meshes.
The parallel efficiency of our code is tested using a number of mesh
partitions, and we verify that the \Metis{} graph partition is
particularly efficient.

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ANZIAM Journal, ISSN 1446-8735, copyright Australian Mathematical Society.