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The available modules can be listed with module avail openfoam command.
If users requiere require the use of very old versions of OpenFOAM they may need to build and deploy their own containers. In this case, they can use Pawsey containers as a guide to deploy their own. Please read the documentation section: Use of old versions of OpenFOAM not provided by Pawsey.
It's also important to note that deployed OpenFOAM container modules have been updated to be based on Ubuntu 20.04, as explained in: Containers changes for the latest updates on Setonix.