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A central scheme for shallow water flows along channels with irregular geometry

Published online by Cambridge University Press:  18 December 2008

Jorge Balbás
Affiliation:
Department of Mathematics, California State University, Northridge, CA 91330, USA. jorge.balbas@csun.edu
Smadar Karni
Affiliation:
Department of Mathematics, University of Michigan, Ann Arbor, MI 48109, USA. karni@umich.edu
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Abstract

We present a new semi-discrete central scheme for one-dimensional shallow water flows along channels with non-uniform rectangular cross sections and bottom topography. The scheme preserves the positivity of the water height, and it is preserves steady-states of rest (i.e., it is well-balanced). Along with a detailed description of the scheme, numerous numerical examples are presented for unsteady and steady flows. Comparison with exact solutions illustrate the accuracy and robustness of the numerical algorithm.

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Type
Research Article
Copyright
© EDP Sciences, SMAI, 2009

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