Galerkin, Petrok-Galerkin and least squares for solution of transient convection-diffusion

Authors

  • Estaner Claro Romão Federal University of Itajubá, Brasil
  • Jairo Aparecido Martins Departamento de Engenharia de Produto, Metso Minerals. Brazil
  • João Batista Campos Silva Universidade Estadual Paulista, Brazil
  • João Batista Aparecido Universidade Estadual Paulista

DOI:

https://doi.org/10.5944/ribim.16.1.42495

Keywords:

Convection-Diffusion, Finite Element, Galerkin, Petrov-Galerkin, Least Squares

Abstract

The Finite Element Method is one of the most known methods for discretization of partial derivatives, however in its standard form, known as Galerkin. This last does not present a satisfactory behavior when applied on convection-diffusion equations with the diffusion coefficient smaller than the convective for less refined meshes. In this work, a study of three variants of the Finite Element Method (Galerkin,Petrov- Galerkin and Minimum Squares - LSFEM -Least Squares Finite Element Method) are presented to the application at a convective-diffusive problem. The chosen approximations are not arbitrary, but due the relations among them. The formulation of each method, is presented, as well as the comparison among the numerical results for the four applications.

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Published

2012-04-01

How to Cite

Claro Romão, E. ., Aparecido Martins, J. ., Campos Silva, J. B. ., & Aparecido, J. B. . (2012). Galerkin, Petrok-Galerkin and least squares for solution of transient convection-diffusion. Revista Iberoamericana De Ingeniería Mecánica, 16(1), 61–74. https://doi.org/10.5944/ribim.16.1.42495

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