Discontinuous Galerkin method for the shallow water equations on complex domains using masked block-structured grids

Title data

Faghih-Naini, Sara ; Kuckuk, Sebastian ; Zint, Daniel ; Kemmler, Samuel ; Köstler, Harald ; Aizinger, Vadym:
Discontinuous Galerkin method for the shallow water equations on complex domains using masked block-structured grids.
In: Advances in Water Resources. (2023) . - 104584.
ISSN 1872-9657
DOI: https://doi.org/10.1016/j.advwatres.2023.104584

Project information

Abstract in another language

We evaluate masked block-structured grids for ocean domains which allow to represent small-scale geometric features without resorting to very small blocks or excessive mesh resolution. The considered approach aims to combine the geometric flexibility of unstructured meshes with the computational efficiency of stencil-based discretizations and is implemented and tested in a quadrature-free discontinuous Galerkin shallow water solver. We investigate the accuracy and the computational performance of the scheme on a range of realistic ocean domains meshed with blocks of different size and provide some comparisons to results obtained on unmasked block-structured grids and unstructured meshes.