"OpenFOAM is a free, open source computational fluid dynamics (CFD) software package released by the OpenFOAM Foundation" (OpenFOAM README).
The below can be used to view all of the installations of OpenFOAM on a particular system, where this example uses Coeus.
$ module avail |& grep -i "openfoam"
CFD/openfoam/5.x/openmpi-2.0/gcc-7.2.0
For a plethora of OpenFOAM tutorials, refer to here.