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Forum: OpenFOAM Running, Solving & CFD

June 23, 2005, 05:13

Replies: 218

LES

Views: 58,739

Posted By henry

P.S. Channel-flow takes a ver

P.S. Channel-flow takes a very long time to evolve, many thousands of time-steps, how many have you done so far?

Forum: OpenFOAM Running, Solving & CFD

June 23, 2005, 04:57

Replies: 218

LES

Views: 58,739

Posted By henry

You could use a NON-periodic c

You could use a NON-periodic channel with a turbulent inlet boundary condition to obtain a starting solution.

Wall-functions are already a near-wall model and it would be inconsistent to use...

Forum: OpenFOAM Running, Solving & CFD

June 23, 2005, 04:30

Replies: 218

LES

Views: 58,739

Posted By henry

Your operating parameters are

Your operating parameters are fine but Eugene may be right that with this near-wall resolution you will not be able to simulate any sensible turbulence genration process there and it dominates the...

Forum: OpenFOAM Running, Solving & CFD

June 22, 2005, 06:13

Replies: 218

LES

Views: 58,739

Posted By henry

Your initialisation is fine, t

Your initialisation is fine, the solution procedure will fix any errors in the initial fields.

What Re are you running?
What Courant-number?
What discretisations schemes?
How fine is your...

Forum: OpenFOAM Running, Solving & CFD

May 18, 2005, 06:34

Replies: 218

LES

Views: 58,739

Posted By henry

Yes currently the sgs viscosit

Yes currently the sgs viscosity is isotropic. Most anisotropic models generate stresses directly rather than an anisotropic viscosity and this would typically be implemented as a correction on a...

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