S25  Métodos Numéricos    Titulo: SPARSE-MATRIX NUMERICAL SOLUTION OF MULTIDIMENSIONAL CONVECTION-DIFFUSION PROBLEMS   Resumo : ABSTRACT. THIS WORK PRESENTS COMPARISONS OF THE REQUIRED COMPUTATIONAL EFFORT TO SOLVE TWO-DIMENSIONAL CONVECTION-DIFFUSION PROBLEMS USING DIFFERENT SOLUTION TECHNIQUES. THE EFFECTS OF PECLET NUMBER AND FLOW DIRECTION ON ALGORITHM PERFORMANCE ARE DISCUSSED UPON. ITERATIVE METHODS, SUCH AS THE STRONG IMPLICIT PROCEDURE, USES MINIMUM COMPUTER TIME AND WERE FOUND TO BE RATHER INSENSITIVE TO THE FLOW DIRECTION. SPARSE-MATRIX DIRECT SOLVERS FOLLOWED IN COMPUTATIONAL PERFORMANCE AND SHOWED SOME DEPENDENCE ON VELOCITY DIRECTION. KEY WORDS: CFD, ITERATIVE METHODS, SPARSE MATRIX, LINEAR SYSTEMS     Autores : de Lemos, Marcelo J. S. Di Fiore dos Santos, Gustavo     Trabalho Completo :   COBEM99 | Comissão  Organizadora | Palestras | Sessões Técnicas | Autor | Simpósios e Sessões Especiais | Revisores |  Título  dos  Trabalhos | Local