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Boundary knot method for 2D and 3D Helmholtz and convection-diffusion problems under complicated geometry (2001)
| Venue: | J. Numer. Methd. Engng |
| Citations: | 17 - 6 self |
BibTeX
@ARTICLE{Hon01boundaryknot,
author = {Y. C. Hon and W. Chen and W. Chen (corresponding},
title = {Boundary knot method for 2D and 3D Helmholtz and convection-diffusion problems under complicated geometry},
journal = {J. Numer. Methd. Engng},
year = {2001},
volume = {56},
pages = {200--1}
}
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Abstract
The boundary knot method (BKM) of very recent origin is an inherently meshless, integration-free, boundary-type, radial basis function collocation technique for the numerical discretization of general partial differential equation systems. Unlike the method of fundamental solutions, the use of non-singular general solution in the BKM avoids the unnecessary requirement of constructing a controversial artificial boundary outside the physical domain. The purpose of this paper is to extend the BKM to solve 2D Helmholtz and convection-diffusion problems under rather complicated irregular geometry. The method is also first applied to 3D problems. Numerical experiments validate that the BKM can produce highly accurate solutions using only relatively a small number of knots. For inhomogeneous cases, some inner knots are found necessary to guarantee accuracy and stability. The stability and convergence of the BKM are numerically illustrated and the completeness issue is also discussed.
Keyphrases
boundary knot method convection-diffusion problem accurate solution inhomogeneous case completeness issue irregular geometry inner knot recent origin numerical discretization fundamental solution non-singular general solution radial basis function collocation technique numerical experiment unnecessary requirement general partial differential equation system small number physical domain
