High Quality Content by WIKIPEDIA articles! OpenFOAM (Open Field Operation and Manipulation) is a C++ toolbox for the development of customized numerical solvers, and pre-/post-processing utilities for the solution of continuum mechanics problems, including computational fluid dynamics (CFD). The code is released as free and open source software under the GNU General Public License. It is maintained by The OpenFOAM Foundation, which is sponsored by Silicon Graphics, the owner of the trademark to the name OpenFOAM.