Character of Programs Needing MPP

• 3D
  • Lots-o-memory

• Modelling phenomena with disparate spatial scales
  • Lots of grid points (uniform or nonuniform mesh)

• Turbulence modelling
  • You can never have high enough Reynold's number

• Very basic physics models
  • Lattice quantum chromodynamics (QCD)
    • 4D

  • Plasma particle-in-cell (PIC)

  • Molecular dynamics

  • N-body problems
    • You can never have enough bodies

• Large simulation domain
  • Global climate modelling

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