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OpenFOAM vs flow5: catalog facts
OpenFOAM	flow5
Best for: Engineers and researchers running fluid dynamics simulations without commercial licence costs	Best for: Hobbyists and engineers doing early aerodynamic or hydrofoil design
Free Free and open source.	Free Free and open source under the GNU GPL v3.
Linux, Command line	macOS
Wide range of physics: turbulence, heat transfer, reactions, acoustics Predictable six-monthly releases All 4 strengths for OpenFOAM Wide range of physics: turbulence, heat transfer, reactions, acoustics Predictable six-monthly releases Extensive regression and performance testing Large user base in industry and academia	Covers wings, planes, hydrofoils and sails in one tool Built-in pre- and post-processing All 4 strengths for flow5 Covers wings, planes, hydrofoils and sails in one tool Built-in pre- and post-processing Uses XFoil, Gmsh and OpenCascade Regular releases with published release notes
Command-line and case-file driven, with a steep learning curve No built-in graphical interface for setup	Online documentation is still under construction Potential flow methods suit preliminary design rather than detailed analysis
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	Not stated if an account is needed
Offline features available	Not stated if it works offline
Official website Full listing and sources Sources for OpenFOAM openfoam.com Catalog checked October 1, 2026	Official website Full listing and sources Sources for flow5 flow5.tech/flow5.html Catalog checked October 2, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.