New concepts in meshless methods

S. N. Atluri, Tulong Zhu

Research output: Contribution to journalArticlepeer-review

207 Scopus citations

Abstract

Meshless methods have been extensively popularized in literature in recent years, due to their flexibility in solving boundary value problems. Two kinds of truly meshless methods, the meshless local boundary integral equation (MLBIE) method and the meshless local Petrov-Galerkin (MLPG) approach, are presented and discussed. Both methods use the moving least-squares approximation to interpolate the solution variables, while the MLBIE method uses a local boundary integral equation formulation, and the MLPG employs a local symmetric weak form. The two methods are truly meshless ones as both of them do not need a 'finite element or boundary element mesh', either for purposes of interpolation of the solution variables, or for the integration of the 'energy'. All integrals can be easily evaluated over regularly shaped domains (in general, spheres in three-dimensional problems) and their boundaries. Numerical examples presented in the paper show that high rates of convergence with mesh refinement are achievable. In essence, the present meshless method based on the LSWF is found to be a simple, efficient and attractive method with a great potential in engineering applications.

Original languageEnglish
Pages (from-to)537-556
Number of pages20
JournalInternational Journal for Numerical Methods in Engineering
Volume47
Issue number1-3
DOIs
StatePublished - Jan 10 2000

Keywords

  • Local Petrov-Galerkin formulation
  • Local boundary integral equation
  • Local symmetric weak form
  • Meshless methods
  • Moving least-squares approximation

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