Invariant conservative difference schemes for shallow water equations in Eulerian and Lagrangian coordinates

Autor:	Dorodnitsyn, V. A., Kaptsov, E. I.
Rok vydání:	2020
Předmět:	Mathematics - Numerical Analysis Mathematical Physics Physics - Fluid Dynamics
Druh dokumentu:	Working Paper
DOI:	10.1063/5.0031936
Popis:	The one-dimensional shallow water equations in Eulerian coordinates are considered. Relations between symmetries and conservation laws for the potential form of the equations, and symmetries and conservation laws in Eulerian coordinates are shown. An invariant difference scheme for equations in Eulerian coordinates with arbitrary bottom topography is constructed. It possesses all the finite-difference analogues of the conservation laws. Some bottom topographies require moving meshes in Eulerian coordinates, which are stationary meshes in mass Lagrangian coordinates. The developed invariant conservative difference schemes are verified numerically using examples of flow with various bottom topographies. Comment: 40 pages, 16 figures, 2 tables
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2009.00710 Zobrazit plný text záznamu View this record from Arxiv