The information-flux method: A true Petrov-Galerkin formulation based on maximum-entropy methods applied to convection-dominated problems

Keijo Nissen, Volker Gravemeier, Wolfgang A. Wall

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The information-flux method is proposed as a novel approach to stable methods. It is a meshfree Petrov-Galerkin formulation based on maximum-entropy basis functions. Stability is ensured by selected weighting functions resembling the information flux of the underlying physical problem. The novelties presented in this article concern the multi-dimensional formulation of the method, translating the good performance previously shown for one-dimensional problems. The use of non-negative weighting functions is key to the accomplishments demonstrated in this study. We present an approach based on two-dimensional freespace solution, which, in contrast to usual streamline approaches, takes two-dimensional effects of the convection into account. Numerical results are shown for one- and two-dimensional convection-dominated convection-diffusion problems.

Original languageEnglish
Title of host publicationECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers
Pages6425-6438
Number of pages14
StatePublished - 2012
Event6th European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2012 - Vienna, Austria
Duration: 10 Sep 201214 Sep 2012

Publication series

NameECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers

Conference

Conference6th European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2012
Country/TerritoryAustria
CityVienna
Period10/09/1214/09/12

Keywords

  • Convection-diffusion problem
  • Information flux
  • Maximum entropy
  • Meshfree method
  • Petrov-Galerkin method
  • Stabilised FEM

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