Unstructured mesh storage

• Unstructured mesh data stored as:
  • Ordered list of coordinate values for each grid node
    real x(1:n),y(1:n),z(1:n)

  • Vector field values at each node
    real ex(1:n),ey(1:n),ez(1:n)
    real ax(1:n),ay(1:n),az(1:n)

  • Connectivity data for each node
    • Integer value and array of indices for each node: The other nodes it connects with.

• Global view of data structure: global numbering 1,2,...,n

• Local view
  • Message-passing
    • Explicit, special handling of connections to nodes on other processor's memory

    • Special algorithms to partition of mesh among processors (spectral bisection, e.g.)

  • Data parallel (pure)
    • Implicit communications for connections to nodes in other processor's memory

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