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Forum: OpenFOAM Running, Solving & CFD

October 18, 2007, 05:10

Replies: 38

Convection discretization schemes for LES

Views: 15,291

Posted By eugene

You hit the nail on the head.

You hit the nail on the head.

If you do not specify a slip boundary to be a wall, no wall distance calculation is done. There are many turbulence models and other utilities which use distance...

Forum: OpenFOAM Running, Solving & CFD

October 15, 2007, 06:24

Replies: 38

Convection discretization schemes for LES

Views: 15,291

Posted By eugene

1. Slip boundaries should be w

1. Slip boundaries should be walls, not patches.
i.e.
top --> type wall;
irrelevant: physicalType slip;
U (file 0/U) slip;
p (file 0/p) zeroGradient;
k (file 0/k) zeroGradient; ...

Forum: OpenFOAM Running, Solving & CFD

October 11, 2007, 06:05

Replies: 38

Convection discretization schemes for LES

Views: 15,291

Posted By eugene

you use filteredLinear as foll

you use filteredLinear as follows:

div(pi,U) Gauss filteredLinear;

The oscillations are probably due to poor inlet or outlet boundary specifications.

Forum: OpenFOAM Running, Solving & CFD

October 4, 2007, 08:25

Replies: 38

Convection discretization schemes for LES

Views: 15,291

Posted By eugene

We have run them with the oneE

We have run them with the oneEqEddyVisc and SpalartAllmaras and are now using them for all our LES/DES calculations. So far so good. I know Henry has run them without an SGS model as well, but...

Forum: OpenFOAM Running, Solving & CFD

October 4, 2007, 05:19

Replies: 38

Convection discretization schemes for LES

Views: 15,291

Posted By eugene

Reference? No, Henry invented

Reference? No, Henry invented them from scratch to stop the staggering in LES a few months ago. We have performed a lot of tests since then and they are unconditionally better than any of our...

Forum: OpenFOAM Running, Solving & CFD

October 3, 2007, 13:46

Replies: 38

Convection discretization schemes for LES

Views: 15,291

Posted By eugene

The best available low dissipa

The best available low dissipation second order schemes in OpenFOAM are filteredLinear and filteredLinear2. The filtering removes staggering caused by pressure-velocity decoupling by introducing...

Forum: OpenFOAM Running, Solving & CFD

October 3, 2007, 12:04

Replies: 38

Convection discretization schemes for LES

Views: 15,291

Posted By eugene

try filteredLinear

try filteredLinear

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