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|Title:||A very high-order finite volume method for the time-dependent convection-diffusion problem with Butcher tableau extension|
Machado, Gaspar J.
|Journal:||Computers and Mathematics With Applications|
|Abstract(s):||The time discretization of a very high-order finite volume method may give rise to new numerical difficulties resulting into accuracy degradations. Indeed, for the simple one-dimensional unstationary convection-diffusion equation for instance, a conflicting situation between the source term time discretization and the boundary conditions may arise when using the standard Runge-Kutta method. We propose an alternative procedure by extending the Butcher Tableau to overcome this specific difficulty and achieve fourth-, sixth- or eighth-order of accuracy schemes in space and time. To this end, a new finite volume method is designed based on specific polynomial reconstructions for the space discretization, while we use the Extended Butcher Tableau to perform the time discretization. A large set of numerical tests has been carried out to validate the proposed method.|
|Appears in Collections:||CMAT - Artigos em revistas com arbitragem / Papers in peer review journals|
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