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-   -   Divergence scheme for high reynolds number LES (https://www.cfd-online.com/Forums/openfoam-solving/169158-divergence-scheme-high-reynolds-number-les.html)

bala_gk1988 April 4, 2016 08:50

Divergence scheme for high reynolds number LES
 
Hi
Can anyone tell me which divergence scheme in openfoam to use for high reynolds number LES.

upwind cannot be used because of dissipation
linear cannot be used due to peclet number criteria ( too many number of cells to satisfy it)

I need a good validated scheme.

anishtain4 April 4, 2016 11:32

Quote:

div(phi,U) Gauss linear;
is an standard option in unstructured LES solvers, however it is not the best. Higher order methods are less dissipative.
Upwind method can be used if you use implicit LES (Furbey et al.)
Peclet number is not an issue since the diffusion is not being solved explicitly.
Higher order central discretizations would've had the Peclet issue if it was the case.

navidmt April 29, 2020 13:01

Quote:

Originally Posted by bala_gk1988 (Post 593286)
Hi
Can anyone tell me which divergence scheme in openfoam to use for high reynolds number LES.

upwind cannot be used because of dissipation
linear cannot be used due to peclet number criteria ( too many number of cells to satisfy it)

I need a good validated scheme.

Have you found any answer for your question?

Santiago April 29, 2020 13:08

Quote:

Originally Posted by navidmt (Post 767888)
Have you found any answer for your question?

Gauss reconCentral cellLimited leastSquares 1.0

navidmt April 29, 2020 13:57

Quote:

Originally Posted by Santiago (Post 767893)
Gauss reconCentral cellLimited leastSquares 1.0

I checked this scheme before. Since I’m working with OF v6 there is no such a scheme.


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