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  • AMS (MOS)  (1)
  • AMS Subject Classifications: 65M12, 65M60, 65N40.  (1)
  • 1
    ISSN: 1436-5057
    Keywords: AMS (MOS) ; 65M05 ; 65M10 ; 65M15 ; Finite difference scheme, cell-centered grids ; local refinement ; refinement in time ; error estimates ; parabolic problem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Es werden Differenzenverfahren für parabolische Anfangswertprobleme für zellenorientierte räumliche Gitter (rechteckig für zwei Raumdimensionen) mit regulärer lokaler Verfeinerung bzgl. Zeit und Raum vorgestellt. Ihre Stabilitäts- und Konvergenzeigenschaften werden studiert. Die Differenzenverfahren basieren auf der Idee der finiten Volumina durch Approximation der Bilanzgleichungen und erhalten die Masse (bzw. die Energie). Die Approximation an den Gitterpunkten nahe der Überschneidung von feineren und gröberen Gittern verwendet eine frühere Idee der Autoren für selbstadjungierte elliptische Operatoren. Die vorgeschlagenen Verfahren sind implizit vom Typ “Euler rückwärts” und unkonditioniert stabil. Eine Fehleranalyse ist angeschlossen.
    Notes: Abstract Finite difference schemes for parabolic initial value problems on cell-centered grids in space (rectangular for two space dimensions) with regular local refinement in space as in time are derived and their stability and convergence properties are studied. The construction of the finite difference schemes is based on the finite volume approach by approximation of the balance equation. Thus the derived schemes preserve the mass (or the heat). The approximation at the grid points near the fine and coarse grid interface is based on the approach proposed by the authors in a previous paper for selfadjoint elliptic equations. The proposed schemes are implicit of backward Euler type and are shown to be unconditionally stable. Error analysis is also presented.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Computing 64 (2000), S. 157-182 
    ISSN: 1436-5057
    Keywords: AMS Subject Classifications: 65M12, 65M60, 65N40. ; Key Words: Finite volume method, parabolic equation, integro-differential equation.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Various finite volume element schemes for parabolic integro-differential equations in 1-D are derived and studied. These types of equations arise in modeling reactive flows or material with memory effects. Our main goal is to develop a general framework for obtaining finite volume element approximations and to study the error analysis. We consider the lowest-order (linear and L-splines) finite volume elements, although higher-order volume elements can be considered as well under this framework. It is proved that finite volume element approximations are convergent with optimal order in H 1-norms, suboptimal order in the L 2-norm and super-convergent order in a discrete H 1-norm.
    Type of Medium: Electronic Resource
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