摘要：In this paper, aspects regarding implementation of the boundary element dual
reciprocity method—multi-domain approach (DRM-MD), in respect to 3D problems
are reviewed. Results of numerical tests on a 3D advection–diffusion problem
with non-uniform velocity field are presented. The sensitivity of the
accuracy and stability of the codes to the continuity of the elements,
scaling, internal DRM nodes and mesh refinement have been tested. The results
show that scaling is essential and that mesh refinement and/or internal DRM
nodes improve the accuracy when the nonhomogeneous term of the governing
equation becomes dominant. The computer code implemented with discontinuous
elements offers higher accuracy, especially for advection dominant transport,
but is much slower than the computer code with continuous elements. At the
present stage, the discontinuous element code has the advantage of
flexibility since it can solve non-homogeneous domains.
