INVESTIGADORES
NIGRO Norberto Marcelo
congresos y reuniones científicas
Título:
FIRST PARALLEL IMPLEMENTATION OF THE PFEM-2 METHOD
Autor/es:
GIMENEZ JUAN; NIGRO NORBERTO
Lugar:
Rosario
Reunión:
Congreso; ENIEF 2011; 2011
Institución organizadora:
AMCA
Resumen:
Particle Finite Element Method - Second Generation (PFEM-2) is a numerical method writtenin a Lagrangian formulation that uses both particles and a mesh to solve the physics equations in anuncoupled way. The method uses fractional-steps with explicit and implicit calculations as needed.The difference with the original form, is that in this second generation a temporal integration schemebased on streamlines integration is added while for the spatial discretization a point-colocation method isadopted. PFEM-2 has proved to obtain accurate and stable results, but it is necessary to make an efficientimplementation to get a competitive code saving computing time.Given that the particle based methods are inherently parallelizable, the present work is focused onthe analysis, the comparison and the selection of the optimal tools and techniques to be used to solve,in an efficient way, each algorithm’s critical stages in each time steps: particle trajectory and acelerationcomputation through streamlines time integration, the remeshing and the equation system solver on themesh (necessary for implicit calculations).In summary, results obtained with this implementation are presented, allowing to simulate, withaccuracy, robustness and at a reasonable computational cost, large numbers of particles in problemswith scalar unknowns, such as scalar transport problems, and vectorials unknows, such as fluid-dynamicproblems.