SR13  Mecânica dos Fluidos    Titulo: NUMERICAL FLOW SIMULATION THROUGH SUDDEN GEOMETRY EXPANSIONS   Resumo : ABSTRACT. THE PRESENT WORK DEVELOPS A METHOD FOR THE SOLUTION OF FLUID FLOW THROUGH SUDDEN GEOMETRY EXPANSIONS. THE ANALYSIS OF THESE PHENOMENA IS A VERY COMPLEX WORK, THAT IS WHY WE ARE BEGINNING BY AN EASIER MODEL AS AN INCOMPRESSIBLE, SINGLE PHASE, TWO-DIMENSIONAL FLOW THROUGH SUDDEN EXPANSIONS WHOSE RELATIONS VARIES FROM 1:3 TO 1:20. FOR THIS IT IS USED A FINITE DIFFERENCES METHOD BASED ON AN EXPLICIT NEWTON S SCHEME. A CARTESIAN GRID IS USED, AND IT IS REFINED NEAR THE EXPANSION (X-DIRECTION) AND CHANNEL WALLS (Y-DIRECTION). TESTS ARE CARRIED OUT FOR STEADY FLOWS FOR REYNOLDS NUMBERS BETWEEN 53 AND 187 AND THE RESULTS ARE FOUND TO COMPARE WELL WITH NUMERICAL DATA FOUND IN THE LITERATURE. KEY WORDS: NUMERICAL SIMULATION, SUDDEN GEOMETRY EXPANSIONS, NEWTON S METHOD     Autores : DE BORTOLI, ÁLVARO LUIS GOMES, SEBASTIÃO CÍCERO P. TAVARES, ALEXANDRE SOARES     Trabalho Completo :   COBEM99 | Comissão  Organizadora | Palestras | Sessões Técnicas | Autor | Simpósios e Sessões Especiais | Revisores |  Título  dos  Trabalhos | Local