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On a hybrid finite-volume-particle method

Published online by Cambridge University Press:  15 December 2004

Alina Chertock  and
Alexander Kurganov
Alina Chertock
Affiliation:
Department of Mathematics, North Carolina State University, Raleigh, NC 27695, USA. chertock@math.ncsu.edu.
Alexander Kurganov
Affiliation:
Department of Mathematics, Tulane University, New Orleans, LA 70118, USA. kurganov@math.tulane.edu.
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Abstract

We present a hybrid finite-volume-particle numerical method for computing the transport of a passive pollutant by a flow. The flow is modeled by the one- and two-dimensional Saint-Venant system of shallow water equations and the pollutant propagation is described by a transport equation.This paper is an extension of our previous work [Chertock, Kurganov and Petrova, J. Sci. Comput. (to appear)], where the one-dimensional finite-volume-particle method has been proposed.The core idea behind the finite-volume-particle method is to use different schemes for the flow and pollution computations: the shallow water equations are numerically integrated using a finite-volume scheme, while the transport equation is solved by a particle method. This way the specific advantages of each scheme are utilizedat the right place. A special attention is given to the recovery of the point values of the numerical solution from its particle distribution. The reconstruction is obtained using a dual equation for the pollutant concentration.This results in a significantly enhanced resolution of the computed solution and also makes it much easier to extendthe finite-volume-particle method to the two-dimensional case.

Keywords

Shallow water equationstransport of passive pollutantfinite-volume schemesparticle method.
Type
Research Article
Information
ESAIM: Mathematical Modelling and Numerical Analysis , Volume 38 , Issue 6 , November 2004 , pp. 1071 - 1091
Copyright
© EDP Sciences, SMAI, 2004

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