Basic HTML version of Foils prepared 15 March 1996

Foil 9 The Second Two Simplifications of the NAS Parallel Benchmarks

From Introduction to Physics and Numerics of NAS Benchmarks CPSP713 Case studies in Computational Science -- Spring Semester 1996. by Geoffrey C. Fox
3) Time Differencing Schemes
  • There are several clever time differencing schemes which have been developed to improve stability and accuracy of Navier Stokes Equations
    • Upwind Differencing
    • Flux-vector Splitting
    • Total Variation Diminishing -- TVD
    • Flux-difference Splitting
  • The benchmarks only use the combination of a particular implicit differencing with artificial dissipation
4) Absence of Turbulence Models
  • Forming the Reynolds Averaged Equations can introduce additional (typically one or two) differential equations and change values of parameters such as viscosity. This is absent in benchmark.

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