Preliminary Additive Schwarz Results

• Droplet impact problem
  • 16 16 32 mesh (8192 cells)
  • density ratio = 1000
• Equation solved:

  
  
  

• Run details:
  • 2 passes used for both Jacobi and SSOR
  • no optimization
  • times are seconds on a 4 200MHz R10000 SGI Challenge running Irix 6.2
  • runs performed with Telluride, but times represent the sum of the two projection solves in the solution only (not the whole code)
• Results:

  Processors Preconditioner Iterations CPU Time

  1 SSOR 38 32

  4 Jacobi 106 21

  4 SSOR 41 9.6

• Note that the parallel SSOR option was unavailable prior to implementation of additive Schwarz