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--- howto:openfoam [2026/02/24 10:44]
ccrosby
+++ howto:openfoam [2026/02/24 13:03] (current)
ccrosby [Latest version: OpenFOAM-v2512]
@@ Line 5: / Line 5: @@
   - [[openfoam#compiling_your_own_openfoam_code|Compiling your own OpenFOAM code]]
   - [[howto:openfoam:hisa|Using the HiSA compressible Solver for OpenFOAM]]
+====== Latest version: OpenFOAM-v2512 ======
+The most recent available version is OpenFOAM-v2512.  In contrast to previous installations, this has been compiled with Intel's OneAPI compiler and runs under IntelMPI.  No special settings or parameters outside of the source script OF2512 are required.  Here is an example job script:
+<file bash runFoam2512.qsub>
+#!/bin/bash
+### This 72-way example calls
+### for 3 (virtual) nodes, each with 24 processor cores
+### Please note that it is necessary to specify both ncpus and mpiprocs, and
+### for OpenFOAM these should be identical to each other.
+### For your own benefit, try to estimate a realistic walltime request.  Over-estimating the
+### wallclock requirement interferes with efficient scheduling, will delay the launch of the job,
+### and ties up more of your CPU-time allocation untill the job has finished.
+#PBS -P projectid
+#PBS -l select=3:ncpus=24:mpiprocs=24:nodetype=haswell_reg
+#PBS -q normal
+#PBS -l walltime=01:00:00
+#PBS -o /mnt/lustre/users/username/foamJobs/job01/stdout
+#PBS -e /mnt/lustre/users/username/foamJobs/job01/stderr
+### Source the openFOAM environment:
+. /home/apps/chpc/compmech/OpenFOAM/OF2512
+# Set this environment variable explicitly.
+export PBS_JOBDIR=/mnt/lustre/users/username/foamJobs/job01
+# Explicitly change to the job directory
+cd $PBS_JOBDIR
+# Count the number of lines in the hosts file to get the number of processors
+nproc=`cat $PBS_NODEFILE | wc -l `
+#### These next statements build an appropriate decomposeParDict file
+#### based on the requested nunber of processors
+echo "FoamFile" > system/decomposeParDict
+echo "{"  >> system/decomposeParDict
+echo "  version             2.0;" >> system/decomposeParDict
+echo "  format            ascii;" >> system/decomposeParDict
+echo "  class        dictionary;" >> system/decomposeParDict
+echo "  object decomposeParDict;" >> system/decomposeParDict
+echo "}"  >> system/decomposeParDict
+echo "numberOfSubdomains " $nproc ";" >> system/decomposeParDict
+echo "method scotch;" >> system/decomposeParDict
+#### End of decomposeParDict file
+# Decompose the case into processor directories
+decomposePar -force > decompose.out
+# Run the solver, simpleFoam in this case
+mpirun -np $nproc simpleFoam -parallel > simpleFoam.out
+# Reconstruct the time directories from the processor directories
+reconstructPar > reconstruct.out
+# Clean up the processor directories
+rm -r processor*
+</file>
 ====== Warning: mpirun parameters changed ======

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