S10  Fluidodinâmica de Escoamento Multifásico    Titulo: SURFACE TENSION IMPLEMENTATION FOR GENSMAC2D   Resumo : IN THE PRESENT WORK WE DESCRIBE A METHOD WHICH ALLOWS THE INCORPORATION OF SURFACE TENSION INTO THE GENSMAC2D CODE. THIS IS ACHIEVED ON TWO SCALES. FIRST ON THE SCALE OF A CELL, THE SURFACE TENSION EFFECTS ARE INCORPORATED INTO THE FREE SURFACE BOUNDARY CONDITIONS THROUGH THE COMPUTATION OF THE CAPILLARY PRESSURE. THE REQUIRED CURVATURE IS ESTIMATED BY FITTING A LEAST SQUARE CIRCLE TO THE FREE SURFACE USING THE TRACKING PARTICLES IN THE CELL AND IN ITS CLOSE NEIGHBORS. ON A SUB-CELL SCALE, SHORT WAVELENGTH PERTURBATIONS ARE FILTERED OUT USING A LOCAL 4-POINT STENCIL WHICH IS MASS CONSERVATIVE. AN EFFICIENT IMPLEMENTATION IS OBTAINED THROUGH A DUAL REPRESENTATION OF THE CELL DATA, USING BOTH A MATRIX REPRESENTATION, FOR EASE AT IDENTIFYING NEIGHBOURING CELLS, AND ALSO A TREE DATA STRUCTURE, WHICH PERMITS THE REPRESENTATION OF SPECIFIC GROUPS OF CELLS WITH ADDITIONAL INFORMATION PERTAINING TO THAT GROUP. THE RESULTING CODE IS SHOWN TO BE ROBUST, AND TO PRODUCE ACCURATE RESULTS WHEN COMPARED WITH EXACT SOLUTIONS OF SELECTED FLUIDDYNAMIC PROBLEMS INVOLVING SURFACE TENSION.    Autores : Castelo F., Antonio 0 Mangiavacchi, Norberto 0 McKee, Sean 0 Tome, Murilo Francisco     Trabalho Completo :   COBEM99 | Comissão  Organizadora | Palestras | Sessões Técnicas | Autor | Simpósios e Sessões Especiais | Revisores |  Título  dos  Trabalhos | Local