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Search: Posts Made By: Lieven
Forum: OpenFOAM Running, Solving & CFD August 6, 2013, 05:49
Replies: 21
Views: 7,229
Posted By Lieven
Hi Danesh, It just depends how you implement...

Hi Danesh,

It just depends how you implement the code. If you include it in the solver directly, it should work since 'U' is simply the velocity. If you want to write it as a coded function...
Forum: OpenFOAM Running, Solving & CFD August 2, 2013, 06:33
Replies: 21
Views: 7,229
Posted By Lieven
Hi Danesh, Averaged profiles are not...

Hi Danesh,

Averaged profiles are not instantaneous profiles. You will never see them in real life as in 'hey look, here I have the log-profile'. It doesn't work like that. You obtain them after...
Forum: OpenFOAM Running, Solving & CFD August 2, 2013, 05:42
Replies: 21
Views: 7,229
Posted By Lieven
Hi Danesh, Were you already using the...

Hi Danesh,


Were you already using the channelFoam solver? Cause based on the fact that you mentioned you were using RAS profiles I assumed you were not (channelFoam accepts only LES turbulence...
Forum: OpenFOAM Running, Solving & CFD August 1, 2013, 09:38
Replies: 21
Views: 7,229
Posted By Lieven
It might be that it takes a bit longer than one...

It might be that it takes a bit longer than one day to get it working ;-)
Forum: OpenFOAM Running, Solving & CFD August 1, 2013, 07:25
Replies: 21
Views: 7,229
Posted By Lieven
Well, you should impose the pressure gradient...

Well, you should impose the pressure gradient explicitly. But not by setting values at inlet and outlet. It's simple to see that this won't work: since the problem is cyclic, the outlet is basically...
Forum: OpenFOAM Running, Solving & CFD July 31, 2013, 09:29
Replies: 21
Views: 7,229
Posted By Lieven
Do you impose a pressure gradient to force the...

Do you impose a pressure gradient to force the flow?
Forum: OpenFOAM Running, Solving & CFD July 31, 2013, 09:16
Replies: 21
Views: 7,229
Posted By Lieven
Hi Danesh, RAS-modeling gives you averaged...

Hi Danesh,

RAS-modeling gives you averaged profiles. Exactly the ones you shouldn't impose ;-)

Simply run your LES simulation with cyclic boundary conditions, start from a uniform field and the...
Forum: OpenFOAM Running, Solving & CFD July 31, 2013, 09:03
Replies: 21
Views: 7,229
Posted By Lieven
Hi Danesh, Usually you make the boundaries...

Hi Danesh,

Usually you make the boundaries cyclic so that the inlet conditions are being generated on the fly. In openfoam you have the option to use either the 'cyclic' boundary condition or the...
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