[mbeaudoin]

Hello,

We are pleased to announce that conversion between the CGNS standard format and OpenFOAM is now possible with two new converters that we have contributed to the openfoam-extend Subversion site.

The first one, foamToCGNS, will convert an OpenFOAM mesh, boundary conditions and solutions to a CGNS file. The CGNS solutions are always stored at the mesh nodes. The resulting CGNS mesh will be unstructured.

The second converter, cgnsToFoam will take a CGNS mesh (structured or unstructured) and its boundary conditions and will convert them to a valid OpenFoam mesh.

The solution stored in the CGNS file can also be extracted to be used as an initial solution.

Currently, both converters are able to deal only with stationnary flows on a fixed mesh.

The converters also depend on a set of libraries that both need to be installed and compiled as well.

The first one is cgnslib_2.5, a recent version of cgnslib from http://www.cgns.org/.

The second one is libcgnsoo_3.0, a C++ wrapper around cgnslib_2.5.

Allwmake files are provided for compiling the libraries and the converters. A set of simple test cases illustrating the use of both converters are also available.

We plan to eventually put some additionnal documentation on the OpenFoam Wiki about these converters. So watch the Sig Turbomachinery section of the Wiki for more information.

For now, the -help option will give you a rough description of the available options.

You might have to adjust the Allwmake and Make/options files for your own installation or for your version of OpenFoam. Please take a quick look at those files before compiling.

Here are the URLs for dowloading the CGNS converters, companion libraries and the test cases using svn.

Converters:
https://openfoam-extend.svn.sourceforge.net/svnroot/openfoam-extend/trunk/Breede r/OSIG/TurboMachinery/applications

Libraries:
https://openfoam-extend.svn.sourceforge.net/svnroot/openfoam-extend/trunk/Breede r/OSIG/TurboMachinery/src

Test cases:
https://openfoam-extend.svn.sourceforge.net/svnroot/openfoam-extend/trunk/Breede r/OSIG/TurboMachinery/tutorials

Enjoy.

Martin Beaudoin, Hydro-Quebec - IREQ
Robert Magnan, Hydro-Quebec - IREQ