Organization Overview
The OpenFOAM Foundation is a non-profit organization that maintains OpenFOAM (Open Source Field Operation and Manipulation), a free, open-source computational fluid dynamics (CFD) toolbox. Written in C++, OpenFOAM provides solvers for a wide range of fluid-flow and heat-transfer problems, from incompressible turbulent flows to multi-phase reactive transport.
OpenFOAM is widely used in academia and industry as an alternative to commercial CFD packages (ANSYS Fluent, STAR-CCM+). Its open-source nature allows users to inspect, modify, and extend solver algorithms — a critical capability for research applications requiring custom physics models.
Key Characteristics
- Solver library: Hundreds of pre-built solvers for steady/transient, incompressible/compressible, single/multi-phase, reactive, and particle-tracking simulations.
- Mesh flexibility: Supports unstructured polyhedral meshing with snappyHexMesh and blockMesh utilities, plus third-party meshing tool integration.
- Community-driven: Active development community with extensive documentation, tutorials, and third-party GUI front-ends (e.g., HELYX, simFlow).
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Market Position & Strategy
OpenFOAM competes as the leading open-source CFD toolbox, offering a free alternative to commercial solvers like ANSYS Fluent and Siemens STAR-CCM+. Its market position is strongest in academia and research, where source-code access enables custom solver development and physics model implementation — capabilities that commercial CFD tools restrict or charge premium rates for.
The OpenFOAM Foundation maintains the official codebase, while ESI Group maintains a fork (OpenFOAM+ / v2006+) with additional features and commercial support. This dual-maintenance model gives users a choice between the foundation version (stability-focused) and the ESI version (feature-focused). Industrial users typically adopt OpenFOAM for specific applications where licensing costs of commercial CFD are prohibitive or where custom physics implementation is required. OpenFOAM is commonly paired with ParaView for post-processing and with meshing tools (snappyHexMesh, cfMesh, ANSYS Meshing) for pre-processing.
Learning Resources
OpenFOAM documentation is maintained at openfoam.org/documentation, including the User Guide, Programmer's Guide, and tutorial cases. The OpenFOAM Forum (CFD Online) and OpenFOAM Foundation YouTube channel provide community support and video tutorials. Wolf Dynamics and CFD Direct offer paid training courses.