Basic HTML version of Foils prepared 15 March 1996

Foil 16 Comments on Three NAS Benchmarks

From Further PDE Solvers for the NAS Benchmarks CPSP713 Case studies in Computational Science -- Spring Semester 1996. by Geoffrey C. Fox
It is not clear to me how realistic these algorithms although they do clearly illustrate sparse matrix operations of many important CFD algorithms
ADI (BT and SP) is an important CFD algorithm
The SP set are based on complex approximations to BT which may not be significant in today's world where we have powerful computers
SSOR is an important Elliptic (steady state solver) but I find its application to implicit (hyperbolic equations) a little peculiar
  • Normally Dt plays role of relaxation parameter
  • Note benchmark solver involves choice w=1.2 -- not the value near 2 expected for elliptic solver
Note LU Benchmark does NOT involve "LU Decomposition Linear Equation Solver" which has very different computational complexity and issues

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