CELL-CENTERED LAGRANGIAN LAX-WENDROFF HLL HYBRID SCHEME ON UNSTRUCTURED MESHES
DOI:
https://doi.org/10.14311/AP.2021.61.0068Keywords:
Lagrangian hydrodynamics, Lax-Wendroff, HLLAbstract
We have recently introduced a new cell-centered Lax-Wendroff HLL hybrid scheme for Lagrangian hydrodynamics [Fridrich et al. J. Comp. Phys. 326 (2016) 878-892] with results presented only on logical rectangular quadrilateral meshes. In this study we present an improved version on unstructured meshes, including uniform triangular and hexagonal meshes and non-uniform triangular and polygonal meshes. The performance of the scheme is verified on Noh and Sedov problems and its second-order convergence is verified on a smooth expansion test.
Finally the choice of the scalar parameter controlling the amount of added artificial dissipation is studied.
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Copyright (c) 2021 Richard Liska
This work is licensed under a Creative Commons Attribution 4.0 International License.
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Accepted 2020-11-02
Published 2021-02-10
