Please use this identifier to cite or link to this item: http://hdl.handle.net/11422/8737
Type: Artigo
Title: Discontinuous subgrid formulations for transport problems
Author(s)/Inventor(s): Arruda, Natália Cristina Braga
Almeida, Regina Célia Cerqueira de
Carmo, Eduardo Gomes Dutra do
Abstract: Indisponível.
Abstract: In this paper we develop two discontinuous Galerkin formulations within the framework of the two-scale subgrid method for solving advection–diffusion-reaction equations. We reformulate, using broken spaces, the nonlinear subgrid scale (NSGS) finite element model in which a nonlinear eddy viscosity term is introduced only to the subgrid scales of a finite element mesh. Here, two new subgrid formulations are built by introducing subgrid stabilized terms either at the element level or on the edges by means of the residual of the approximated resolved scale solution inside each element and the jump of the subgrid solution across interelement edges. The amount of subgrid viscosity is scaled by the resolved scale solution at the element level, yielding a self adaptive method so that no additional stabilization parameter is required. Numerical experiments are conducted in order to demonstrate the behavior of the proposed methodology in comparison with some discontinuous Galerkin methods.
Keywords: Discontinuous Galerkin
Two-scale finite element model
Advection–diffusion-reaction equations
Subject CNPq: CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::AREAS CLASSICAS DE FENOMENOLOGIA E SUAS APLICACOES::DINAMICA DOS FLUIDOS
Production unit: Núcleo Interdisciplinar de Dinâmica dos Fluidos
Publisher: Elsevier
In: Computer Methods in Applied Mechanics and Engineering
Volume: 199
Issue: 49-52
Issue Date: 1-Jul-2010
DOI: 10.1016/j.cma.2010.06.028
Publisher country: Brasil
Language: eng
Right access: Acesso Aberto
ISSN: 0045-7825
Appears in Collections:Engenharias

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