• Let us copy the tutorial test case propeller:
  # cd $FOAM_RUN
  # cp -r $WM_PROJECT_DIR/tutorials/incompressible/\
  pimpleFoam/RAS/propeller ./

   

• The case is already set up and can be launched using the script Allrun ^9.3
  
  

  # ./Allrun
  # paraFoam^9.4

   

#!/bin/sh
cd ${0%/*} || exit 1    # Run from this directory

# Source tutorial run functions
. $WM_PROJECT_DIR/bin/tools/RunFunctions

./Allrun.pre

runApplication decomposePar

runParallel `getApplication`

runApplication reconstructPar

• At first we set the working directory.
• Using RunFunctions we introduce the functions from file
  $WM_PROJECT_DIR/bin/tools/RunFunctions , which will be auxiliary functions in the script (e.g. getApplication, runApplication and runParallel).
• Running script Allrun.pre makes the mesh and runs other necessary initializations (see the next section).
• We distribute the computation to multiple processors using decomposePar, do the parallel computation using mpiexec and in the end reconstruct the results and mesh using reconstructPar.