Solution of Poissons equation by iterative DRBEM using compactly supported, positive definite radial basis function

Abstract

In the numerical solution of three-dimensional boundary value problems, the matrix size can be so large that it is beyond a computers capacity to solve it. To overcome this difficulty, an iterative dual reciprocity boundary element method (DRBEM) is developed to solve Poissons equation without the need of assembling a matrix. The DRBEM procedure requires that the right hand side of Poissons equation be approximated by a radial basis function interpolation. In the iterative solution, it is found that only compactly supported, positive definite radial basis functions lead to converged results.