Abstract

We investigate the concept of dual-weighted residuals for measuring model errors in the numerical solution of nonlinear partial differential equations. The method is first derived in the case where only model errors arise and then extended to handle simultaneously model and discretization errors. We next present an adaptive model/mesh refinement procedure where both sources of error are equilibrated. Various test cases involving Poisson equations and convection-diffusion-reaction equations with complex diffusion models (oscillating diffusion coefficient, nonlinear diffusion, multicomponent diffusion matrix) confirm the reliability of the analysis and the efficiency of the proposed methodology.

MSC codes

  1. 65C20
  2. 65N15
  3. 65N30
  4. 65N50
  5. 65J15

Keywords

  1. model adaptivity
  2. a posteriori estimates
  3. finite elements
  4. Galerkin methods
  5. duality

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References

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Information & Authors

Information

Published In

cover image Multiscale Modeling & Simulation
Multiscale Modeling & Simulation
Pages: 221 - 238
ISSN (online): 1540-3467

History

Published online: 26 July 2006

MSC codes

  1. 65C20
  2. 65N15
  3. 65N30
  4. 65N50
  5. 65J15

Keywords

  1. model adaptivity
  2. a posteriori estimates
  3. finite elements
  4. Galerkin methods
  5. duality

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