11th September 2025

OpenFOAM v13 | Patch Releases

Patched versions of the openfoam13 pack have been released for the following versions of Ubuntu Linux, 64 bit:

22.04 LTS, codename jammy
24.04 LTS, codename noble
25.04, codename plucky
25.10, codename questing

See the Download v13 | Ubuntu page for installation and upgrade instructions.

The packs can be installed or upgraded on Windows and installed or upgraded on macOS.

The Patch Releases of OpenFOAM 13 are: 20250911, 20260212 and 20260407

Subversion Numbering

The OpenFOAM Foundation maintains two public repositories of source code of OpenFOAM:

The development line of OpenFOAM (OpenFOAM-dev), packaged weekly as openfoam-dev, which includes major code changes that can break backward compatibility.
The version-release source repository for the latest major version release — currently OpenFOAM-13 — that incorporates latest code fixes without breaking backward compatibility.

The openfoam13 packs include the source code of OpenFOAM. Each pack has a subversion number represented by the packaging date in YYYYMMDD format. For example, a user can list the subversions of the openfoam13 packs by the following command:

apt-cache policy openfoam13

This writes text, e.g. for the initial release and patched versions of OpenFOAM-13:

openfoam13:
  Installed: 20260407
  Candidate: 20260407
  Version table:
 *** 20260407 500
        500 http://dl.openfoam.org/ubuntu jammy/main amd64 Packages
        100 /var/lib/dpkg/status
     20260212 500
        500 http://dl.openfoam.org/ubuntu jammy/main amd64 Packages
     20250911 500
        500 http://dl.openfoam.org/ubuntu jammy/main amd64 Packages
     20250708 500 
        500 http://dl.openfoam.org/ubuntu jammy/main amd64 Packages

Source Code of a Subversion

The OpenFOAM-13 repository is tagged with the subversion number so that users can reference the source code corresponding to a particular pack exactly. Using the tag, the corresponding source code can be obtained either as a tar.gz archive or using Git.

The patched versions can be viewed in a browser at https://dl.openfoam.org/source with links to download the archived sources. For example, to download the patch version 20260212, the user can click the link labelled 13.20260212. After downloading and extracting the archive, it is recommended to be renamed without the subversion number. From the command line the download, extraction and renaming can be done by:

wget -O - http://dl.openfoam.org/source/13.20260407 | tar xvz
mv OpenFOAM-13-* OpenFOAM-13

The same source code can be obtained from the repository using Git, e.g.

git clone git@github.com:OpenFOAM/OpenFOAM-13.git
cd OpenFOAM-13
git checkout tags/20260407