OpenFOAM is a free, open source CFD software package released free and open-source under the GNU General Public License. It has a large user base across most areas of engineering and science, from both commercial and academic organisations. OpenFOAM has an extensive range of features to solve anything from complex fluid flows involving chemical reactions, turbulence and heat transfer, to solid dynamics and electromagnetics. More ...
OpenFOAM comprises four main directories:
Solvers
Modelling
Boundary conditions
Numerics
Post-processing