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flow5 vs OpenFOAM: catalog facts
flow5	OpenFOAM
Best for: Hobbyists and engineers doing early aerodynamic or hydrofoil design	Best for: Engineers and researchers running fluid dynamics simulations without commercial licence costs
Free Free and open source under the GNU GPL v3.	Free Free and open source.
macOS	Linux, Command line
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	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
Online documentation is still under construction Potential flow methods suit preliminary design rather than detailed analysis	Command-line and case-file driven, with a steep learning curve No built-in graphical interface for setup
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Offline features available
Official website Full listing and sources Sources for flow5 flow5.tech/flow5.html Catalog checked October 2, 2026	Official website Full listing and sources Sources for OpenFOAM openfoam.com Catalog checked October 1, 2026

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