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robb July 26, 2010 11:39

Parallel Processing ocean wave multiphase model
Dear All,

I have successfully produced free surface waves using a multiphase setup in both 2D and 3D using CFX 11. The models have very conservate parameters and run fine on 1 processor, but as soon as i submit the same model in parallel it fails. The out file shows successful partitioning, and implimentation of MPICH communication on the cluster. I have tried standard MeTiS partitioning and coupled (-part-coupled on linux script). I was wondering if there were any tips for this such as partition weighting or partition algorithym that anyone has for multiphase parallel solving?
At the moment the models run using a single processor, but as soon as i attempt to parallel solve the same model, it fails on the first few iterations, any idea what i am missing?



stumpy July 26, 2010 14:37

Check that your partition boundaries do not line up with the free surface. If you write out a backup/res file after 1 timestep, then plot isosurfaces of partition number in Post. If they do line up, then try a user specified direction partitioning option.

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