OpenFOAM  v1812
About: OpenFOAM (Open Field Operation and Manipulation) is a CFD (computational fluid dynamics) toolbox to simulate anything from complex fluid flows involving chemical reactions, turbulence and heat transfer, to solid dynamics, electromagnetics and the pricing of financial options. The core technology is a set of efficient C++ modules.
  Fossies Dox: OpenFOAM-v1812.tgz  ("inofficial" and yet experimental doxygen-generated source code documentation)  

OpenFOAM Documentation