FEST-3D
FEST-3D: A Linux-based structured-grid CFD solver with broad flow models and MPI support. Ranked #19 of 89 in Physics Simulation Software by our editors (7.2/10); pricing: Open source; best for researchers needing a specialized compressible-flow solver.
At a glance
- Editor score7.2 / 10
- PricingOpen source
- Best forResearchers needing a specialized compressible-flow solver
- Paid fromFree
- Delivery modeDesktop
- Facts checked24 Sep 2026
Where it wins
- Models incompressible and compressible flow on structured grids
- Offers multiple flux, reconstruction, time-integration and turbulence models
- Supports MPI multiblock runs and VTK or Tecplot output
Where it doesn't
- Linux-only deployment limits platform flexibility
- Focused on structured-grid CFD rather than general physics simulation
- Documentation notes known MPI and WSL limitations
Our verdict on FEST-3D
FEST-3D is an open-source Fortran 90 computational-fluid-dynamics solver for researchers working with incompressible or compressible flow on structured grids. It covers inviscid, laminar, transitional and turbulent flows through modular, multiblock finite-volume methods. The project is distributed as GPLv3 code for local execution on Linux, making it a specialized option for people whose work fits its solver scope rather than a general-purpose physics simulation package.
Its technical breadth is a central strength. Available inviscid flux schemes include AUSM, LDFSS, AUSM+, AUSM+-UP and SLAU; spatial reconstruction includes MUSCL, PPM, WENO and WENO-NM. Time integration offers explicit and implicit methods, including Runge-Kutta and LU-SGS variants. The listed turbulence models are SA, SST, SST2003 and k-kL, while transition options include Gamma LCTM2015 and SA-BC. MPI-parallel execution supports multiblock simulations. This range is relevant to researchers needing model and scheme choices within structured-grid CFD, but the specialized focus is less suitable for broader physics workflows.
Tutorial test cases cover ramps, smooth bumps, lid-driven cavities, flat plates and RAE2822, and results can be exported in VTK or Tecplot formats for external post-processing. These provide a route to explore common flow cases and connect results to visualization tools. According to the project notes, documentation identifies known MPI and WSL limitations, so teams depending on those environments should review the guidance before adopting it. Choose FEST-3D when Linux-based, structured-grid incompressible or compressible flow is the core need; look elsewhere if you need a cross-platform or more general simulation tool.
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FEST-3D pricing
FEST-3D fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Delivery mode | Desktop |
| Lesson library | Yes |
| Authoring tools | Yes |
| Assessment tools | No |
| 3D visuals | Yes |
| Offline access | Yes |
| Data export | Yes |
| Deployment | Desktop, Self-hosted |
| Platforms | Linux |
| Support | Email, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Open source |
| Website | fest3d.github.io |
| Facts checked | 24 Sep 2026 |
Alternatives to FEST-3D
- COMSOL MultiphysicsA broad desktop environment for coupled physics, engineering models, and custom simulation apps.9.4
- Ansys FluentA deep CFD and HPC environment for demanding industrial simulation work.9.3
- SimScaleA broad browser-based multiphysics platform with flexible cloud workflows and tiered access.9.1
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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