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Is anyone here able to compare this FUN3D CFD solver with open source CFD software, such as PyFR, Fluidity or OpenFOAM? In particular, has anyone done any bench

Is anyone here able to compare this FUN3D CFD solver with open source CFD software, such as PyFR, Fluidity or OpenFOAM? In particular, has anyone done any benchmark comparisons? I'm wondering if maybe NASA would be better off over the long term, if they ported their models to a more accessible platform. It sounds like they are having trouble hiring people who can work on their current stack.

fcanesin 9y ago
This opensource libraries that you mention (and most in general) are focused in generic constructs of methods for the solution of partial differential equations (PDEs). PyFR - flux reconstruction. OpenFOAM - Finite Volume. The list is actually extensive, there are libraries with focus in Finite Element, Finite Difference, Boundary Element, Smoothed Particle hydrodynamics and so on. The difference here is that this is a solver, not a library. So it is focused on a specific set of PDEs, by doing so you can apply optimizations that are specific to this PDEs and the space representation that it uses, this optimizations are not general to the underlying method of solution (which can actually be a combination of methods), so it will be extremely hard for this generic libraries to compete in performance with a focused solver.