OpenFoam

OpenFOAM is a popular open-source computational fluid dynamics (CFD) software package used for simulating complex fluid flow problems. It provides a comprehensive range of tools for solving problems involving flow of fluids, including heat and mass transfer.

Running OpenFoam jobs

To run OpenFOAM on the cluster, you first need to load the appropriate module. On the DMOG cluster, the OpenFOAM module can be loaded using the following commands:

flight env activate gridware
module load apps/openfoamplus

Note

The default version of OpenFOAM is 22.06, but we also have 24.12 available. This can be loaded instead with:

module load apps/openfoamplus/24.12

Once you have loaded the module, you can run OpenFOAM applications using the standard OpenFOAM command line interface. Here are a couple of example jobscripts to get you started:

Example 1: Running an OpenFOAM job on the “nodes” queue

#!/bin/bash
#SBATCH --job-name=myOpenFOAMJob
#SBATCH --nodes=2
#SBATCH --ntasks-per-node=16
#SBATCH --time=1:00:00
#SBATCH --partition=nodes

flight env activate gridware
module load apps/openfoamplus

mpirun -np $SLURM_NTASKS --hostfile $SLURM_JOB_NODELIST interFoam -parallel

Example 2: Running an OpenFOAM job on the “gpu” queue (using GPUs)

#!/bin/bash
#SBATCH --job-name=myOpenFOAMJob
#SBATCH --nodes=1
#SBATCH --ntasks-per-node=8
#SBATCH --gres=gpu:1
#SBATCH --time=1:00:00
#SBATCH --partition=gpu

flight env activate gridware
module load apps/openfoamplus

mpirun -np $SLURM_NTASKS --hostfile $SLURM_JOB_NODELIST interFoam -parallel

In the above examples, we use the mpirun command to run the OpenFOAM application in parallel. The -np option specifies the number of processes to be run, and --hostfile specifies the file that contains the list of hosts to be used for the job.