Forum: OpenFOAM Running, Solving & CFD
December 28, 2022, 13:15
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Replies: 34
Views: 6,532
180 is difficult to make turbulent. I recommend...
180 is difficult to make turbulent. I recommend that you change viscosity and run at a higher Re for a bit, just to get turbulence. Than u can switch tje viscosity back. Also, be ready that when u...
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Forum: OpenFOAM Running, Solving & CFD
June 4, 2020, 03:26
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Replies: 34
Views: 6,532
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Forum: OpenFOAM Running, Solving & CFD
June 1, 2020, 06:12
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Replies: 34
Views: 6,532
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Forum: OpenFOAM Running, Solving & CFD
June 1, 2020, 05:08
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Replies: 34
Views: 6,532
The idea is that the domain is infinite in the...
The idea is that the domain is infinite in the wall-parallel directions. We simulate that with cyclic boundaries. If you have walls on the side, that is going to lead to different results, since...
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Forum: OpenFOAM Running, Solving & CFD
August 13, 2019, 04:11
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Replies: 34
Views: 6,532
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Forum: OpenFOAM Running, Solving & CFD
August 12, 2019, 15:44
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Replies: 34
Views: 6,532
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Forum: OpenFOAM Running, Solving & CFD
August 12, 2019, 15:36
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Replies: 34
Views: 6,532
I mean, yes, the gradP and tau_w are trivially...
I mean, yes, the gradP and tau_w are trivially connected in the case of channel flow, so in principle you should get similar results using the two methods. I prefer computing it by definition because...
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Forum: OpenFOAM Running, Solving & CFD
August 12, 2019, 15:22
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Replies: 34
Views: 6,532
Look at how I compute y+ in a post in this very...
Look at how I compute y+ in a post in this very thread. Basically, you can just compute tau_w by definition as (nu + nuSgs) du/dy, where the gradient is computed using the first off-wall value from...
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Forum: OpenFOAM Running, Solving & CFD
August 12, 2019, 15:09
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Replies: 34
Views: 6,532
OK, I see. I have to say that I've never looked...
OK, I see. I have to say that I've never looked at the pressure gradient values that much, but rather at u_tau, tau_w and Re_tau. How does the error look for those quantities, is it different from...
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Forum: OpenFOAM Running, Solving & CFD
August 12, 2019, 15:00
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Replies: 34
Views: 6,532
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Forum: OpenFOAM Running, Solving & CFD
August 12, 2019, 14:08
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Replies: 34
Views: 6,532
1. Yes, see...
1. Yes, see https://bitbucket.org/lesituu/channel_flow_data/src/master/OpenFOAM_setup/constant/LESProperties
I'd recommend using WALE though. Or no SGS model at all.
2. You can see the...
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Forum: OpenFOAM Running, Solving & CFD
November 4, 2015, 10:59
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Replies: 34
Views: 6,532
Hi!
Regarding the ICs, I used the channel395...
Hi!
Regarding the ICs, I used the channel395 tutorial case that is availabnle in openfoam as a starting point. Some initial field is given there, and I did not bother looking deeper into that...
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Forum: OpenFOAM Running, Solving & CFD
November 4, 2015, 03:30
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Replies: 34
Views: 6,532
Hi Mohamed!
I did a quick test using the...
Hi Mohamed!
I did a quick test using the UMean profile for mesh M1 and got a a value of 1.74.
We have
y^+ = y_p*sqrt((nu+nuSgs)*U_p/y_p)/nu,
where the _p values are in the cell center closest...
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Forum: OpenFOAM Running, Solving & CFD
July 2, 2015, 12:33
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Replies: 34
Views: 6,532
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