GASP

OpenFOAM is the free, open-source CFD software developed primarily by OpenCFD Ltd since 2004. It has a large user base across most areas of engineering and science, from both commercial and academic organizations. OpenFOAM has an extensive range of features to solve anything from complex fluid flows involving chemical reactions, turbulence and heat transfer, to acoustics, solid mechanics and electromagnetics. OpenFOAM is professionally released every six months to include customer-sponsored developments and contributions from the community. It is independently tested by ESI-OpenCFD's application specialists, development partners and selected customers, and supported by ESI's worldwide infrastructure, values and commitment. Quality assurance is based on rigorous testing. The process of code evaluation, verification and validation includes several hundred daily unit tests, a medium-sized test battery run on a weekly basis, and a large industry-based test battery-run.

Fire Dynamics Simulator (FDS) is a free, open source tools for modeling and visualizing fire-driven flows. FDS is a computational fluid dynamics code that numerically solves a form of the Navier–Stokes equations for low-speed, thermally driven flow, with particular emphasis on smoke and heat transport from fires. It uses large-eddy simulation to represent complex fire-plume dynamics and can be applied to scenarios involving fire, wind, sprinklers, ventilation, geometry, materials, and other conditions that influence fire behavior. Users define a scenario through text-based input files, run the calculation with FDS, and analyze the resulting data. It displays output from FDS and CFAST simulations using OpenGL-based 3D graphics and scientific visualization methods, including animated smoke and tracer particles, two- and three-dimensional shaded contours, iso-surfaces, temperature fields, and flow vectors showing direction and magnitude.