We introduce a new second-order central-upwind scheme for the Saint-Venant system of shallow water equations on triangular grids. We prove that the scheme both preserves “lake at rest” steady states and guarantees the positivity of the computed fluid depth. Moreover, it can be applied to models with discontinuous bottom topography and irregular channel widths. We demonstrate these features of the new scheme, as well as its high resolution and robustness in a number of numerical examples.
Mots clés : hyperbolic systems of conservation and balance laws, semi-discrete central-upwind schemes, Saint-Venant system of shallow water equations
@article{M2AN_2011__45_3_423_0, author = {Bryson, Steve and Epshteyn, Yekaterina and Kurganov, Alexander and Petrova, Guergana}, title = {Well-balanced positivity preserving central-upwind scheme on triangular grids for the {Saint-Venant} system}, journal = {ESAIM: Mathematical Modelling and Numerical Analysis }, pages = {423--446}, publisher = {EDP-Sciences}, volume = {45}, number = {3}, year = {2011}, doi = {10.1051/m2an/2010060}, mrnumber = {2804645}, zbl = {1267.76068}, language = {en}, url = {http://www.numdam.org/articles/10.1051/m2an/2010060/} }
TY - JOUR AU - Bryson, Steve AU - Epshteyn, Yekaterina AU - Kurganov, Alexander AU - Petrova, Guergana TI - Well-balanced positivity preserving central-upwind scheme on triangular grids for the Saint-Venant system JO - ESAIM: Mathematical Modelling and Numerical Analysis PY - 2011 SP - 423 EP - 446 VL - 45 IS - 3 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/m2an/2010060/ DO - 10.1051/m2an/2010060 LA - en ID - M2AN_2011__45_3_423_0 ER -
%0 Journal Article %A Bryson, Steve %A Epshteyn, Yekaterina %A Kurganov, Alexander %A Petrova, Guergana %T Well-balanced positivity preserving central-upwind scheme on triangular grids for the Saint-Venant system %J ESAIM: Mathematical Modelling and Numerical Analysis %D 2011 %P 423-446 %V 45 %N 3 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/m2an/2010060/ %R 10.1051/m2an/2010060 %G en %F M2AN_2011__45_3_423_0
Bryson, Steve; Epshteyn, Yekaterina; Kurganov, Alexander; Petrova, Guergana. Well-balanced positivity preserving central-upwind scheme on triangular grids for the Saint-Venant system. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 45 (2011) no. 3, pp. 423-446. doi : 10.1051/m2an/2010060. http://www.numdam.org/articles/10.1051/m2an/2010060/
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