Author(s)

Z.H. Qiu, L.C. Wrobel & H. Power

Abstract

An evaluation of boundary element schemes for convection-diffusion problems Z.H. Qiu, L.C. Wrobel, H. Power Wessex Institute of Technology, University of Portsmouth, Ashurst Lodge, Ashurst, n 6*0^ 2,4 A, ABSTRACT This paper presents a numerical evaluation of the performance of three different boundary element schemes for solving steady-state convection- diffusion problems with variable velocity fields. Two of these schemes are based on the dual reci- procity BEM: the first uses the fundamental solution of Laplace's equation and treats the whole convective part through the DRM; the other decomposes the ve- locity field into an average and a perturbation, and uses the fundamental solution of the convection- diffusion equation for constant velocity. In this case, only the perturbation is treated using a dual reciprocity approximation. The third scheme also decomposes the velocity field into an average and a perturbation, but the effects of the perturbation velocit

Keywords