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Computation of fluid flow with a parallel multigrid solver
Author(s) -
Schreck E.,
Perić M.
Publication year - 1993
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1650160404
Subject(s) - multigrid method , solver , computational fluid dynamics , computation , computational science , computer science , flow (mathematics) , fluid dynamics , parallel computing , mechanics , mathematics , algorithm , geometry , physics , partial differential equation , mathematical analysis , programming language
A finite volume numerical method for the prediction of fluid flow and heat transfer in simple geometries was parallelized using a domain decomposition approach. The method is implicit, uses a colocated arrangement of variables and is based on the SIMPLE algorithm for pressure‐velocity coupling. Discretization is based on second‐order central difference approximations. The algebraic equation systems are solved by the ILU method of Stone. 1 To accelerate the convergence, a multigrid technique was used. The efficiency was examined on three different parallel computers for laminar flow in a pipe with an orifice and natural convection in a closed cavity. It is shown that the total efficiency is made up of three major factors: numerical efficiency, parallel efficiency and load‐balancing efficiency . The first two factors were thoroughly investigated, and a model for predicting the parallel efficiency on various computers is presented. Test calculations indicate reasonable total efficiency and favourable dependence on grid size and the number of processors.