Invariant conservative difference schemes for shallow water equations in Eulerian and Lagrangian coordinates
Numerical Analysis
2023-04-18 v1 Numerical Analysis
Mathematical Physics
math.MP
Fluid Dynamics
Abstract
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.
Keywords
Cite
@article{arxiv.2009.00710,
title = {Invariant conservative difference schemes for shallow water equations in Eulerian and Lagrangian coordinates},
author = {V. A. Dorodnitsyn and E. I. Kaptsov},
journal= {arXiv preprint arXiv:2009.00710},
year = {2023}
}
Comments
40 pages, 16 figures, 2 tables