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#1 |
Senior Member
Join Date: Jan 2014
Posts: 179
Rep Power: 12 ![]() |
Hi guys,
i just want to ask a simple question, I heard often that OF is 2nd order in spatial and time. Higher order in time: Possible, implementing Runge-Kutta Higher order spatial: If I have a look at the numerical schemes of OpenFoam on this side: http://openfoam.org/docs/user/fvSchemes.php For those terms is always a fourth order interpolation scheme existing: interpolationSchemes snGradSchemes gradSchemes Gradient ![]() ![]() ![]() This means that the reconstruction of the flux could be done by 4th order polynomials (bounded or unbounded) for all NS Eq Terms . So this must be 4th order in space, or do I miss something really important? Thanks to you In addition to that: How can I use the fourth order schemes in correct way? I got always the error that the fourth order schemes are unknown Code:
gradSchemes { default none; grad(p) Gauss fourth; } divSchemes { default none; div(phi,U) Gauss fourth; } laplacianSchemes { default none; laplacian(nu,U) Gauss fourth; laplacian((1|A(U)),p) Gauss fourth; } interpolationSchemes { default none; interpolate(HbyA) cubicCorrection; } snGradSchemes { default fourth; } fluxRequired { default no; p ; } |
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#2 |
Senior Member
Join Date: Jan 2014
Posts: 179
Rep Power: 12 ![]() |
no one can comment on that?
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