RE: Running large grids using OpenFOAM on XSEDE Kraken Mark William Crosskey https://conferences.xsede.org/c/message_boards/find_message?p_l_id=&messageId=668171 2014-03-07T20:24:16Z 2014-02-24T18:14:51Z

Karthik,<br /><br />I believe I&#039;ve found a way around decomposePar not running in parallel. The solution is to use redistributePar as it says in the header file:<br /><br /># Create empty processor directories (have to exist for argList)<br />mkdir processor0<br />..<br />mkdir processorN<br /># Copy undecomposed polyMesh<br />cp -r constant processor0<br /># Distribute<br />mpirun -np ddd redistributePar -parallel (for Kraken this would be aprun -n redistributePar -parallel)<br /><br />However, this leaves out a very important line on the second step. You also have to do &#034;cp -r 0 processor0&#034; or the fields will not be distributed with the mesh. Once the results are finished, you also cannot recombine them with recomposePar as that utility can also not be run in parallel. Therefore, you can create the something.openfoam file and read in each section of the grid or all of them at once from the processor directories in Fieldview/Paraview using the OpenFOAM direct reader.<br /><br />-Mark

Mark William Crosskey 2014-02-24T18:14:51Z