OpenFOAM (for "Open source 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 managed, maintained and distributed by The OpenFOAM Foundation, which is supported by voluntary contributors. The OpenFOAM name is a registered trademark of OpenCFD Ltd and licensed to the OpenFOAM Foundation Ltd.