Forum: OpenFOAM Programming & Development
September 23, 2014, 03:46
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Replies: 123
Views: 32,011
Hello Andy,
I'm calculating the Cf values...
Hello Andy,
I'm calculating the Cf values by using the wallShearStress utility. This yields tauW at the wall patches. From that, Cf is calculated using
Cf = |tauW|/(0.5*rho0*U0^2)
where U0...
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Forum: OpenFOAM Programming & Development
September 22, 2014, 09:47
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Replies: 123
Views: 32,011
Hello everyone,
unfortunately the results...
Hello everyone,
unfortunately the results I presented above weren't sufficiently converged (that's why they were depending upon the initial conditions). I am sorry about that - I fell for the...
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Forum: OpenFOAM Programming & Development
September 15, 2014, 08:10
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Replies: 123
Views: 32,011
Hello everyone,
just a quick update:...
Hello everyone,
just a quick update: following puplu's hint and also by modifying the initial conditions in my flat plate cases (Sidenote: somehow, the solution of simpleFoam depends on the...
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Forum: OpenFOAM Programming & Development
September 14, 2014, 08:01
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Replies: 123
Views: 32,011
Hello everyone,
Sorry about being so slow...
Hello everyone,
Sorry about being so slow again. The last few years I kind of drifted away from CFD and my current research focuses more on acoustics, but I will try to keep on working to finally...
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Forum: OpenFOAM Programming & Development
November 16, 2011, 07:26
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Replies: 123
Views: 32,011
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Forum: OpenFOAM Programming & Development
September 6, 2011, 05:09
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Replies: 123
Views: 32,011
Hello,
sorry about being slow with things...
Hello,
sorry about being slow with things lately - I caught the chance of having a cold and thus staying at home today to make the turbulence model compatible with OF 2.0.x. Please bear in mind...
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Forum: OpenFOAM Programming & Development
May 5, 2011, 04:30
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Replies: 123
Views: 32,011
Hello, José,
thanks for sharing your...
Hello, José,
thanks for sharing your results with us. Especially the NACA0012 looks great! I didn't think the implementation would perform so well. It does seem to have some problems in the...
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Forum: OpenFOAM Programming & Development
March 10, 2011, 12:51
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Replies: 123
Views: 32,011
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Forum: OpenFOAM Programming & Development
March 10, 2011, 09:09
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Replies: 123
Views: 32,011
Hello, José,
sure, go ahead and post the...
Hello, José,
sure, go ahead and post the polar. It would be interesting, too, to compare the polar with results obtained with the k-Omega SST model, if you have that data available.
So you...
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Forum: OpenFOAM Programming & Development
March 10, 2011, 04:01
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Replies: 123
Views: 32,011
Hello, José,
what physical quantity...
Hello, José,
what physical quantity differs from literature by 8%? I assume it is the drag coefficient? If so, I think this is a pretty good start, especially for that angle of attack.
...
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Forum: OpenFOAM Programming & Development
March 1, 2011, 03:26
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Replies: 123
Views: 32,011
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Forum: OpenFOAM Programming & Development
March 1, 2011, 03:24
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Replies: 123
Views: 32,011
Hello, everybody,
so I just did some of...
Hello, everybody,
so I just did some of the flat plate simulations with the corrected version of the turbulence model I posted yesterday. Cf distributions along the plates for two different...
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Forum: OpenFOAM Programming & Development
February 28, 2011, 11:33
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Replies: 123
Views: 32,011
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Forum: OpenFOAM Programming & Development
February 28, 2011, 11:20
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Replies: 123
Views: 32,011
Hello, Alex,
wow, yes you're right. I...
Hello, Alex,
wow, yes you're right. I totally forgot to add the max function when returning F1. I owe you a beer, I would've never discovered this after doublechecking the code multiple times....
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Forum: OpenFOAM Programming & Development
February 28, 2011, 01:48
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Replies: 123
Views: 32,011
Hello,
no, I wouldn't say that. It's just...
Hello,
no, I wouldn't say that. It's just the model is quite sensitive to inlet conditions. You can try and vary omega at the inlet/freestream a bit and have a look if it changes the drag...
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Forum: OpenFOAM Programming & Development
February 27, 2011, 04:52
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Replies: 123
Views: 32,011
Hello,
what k-Omega model were you using...
Hello,
what k-Omega model were you using for your simulations? The "old" version of Wilcox' model (as implemented in OF) ist quite sensitive to freestream data.
For the grid requirements when...
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Forum: OpenFOAM Programming & Development
February 25, 2011, 05:59
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Replies: 123
Views: 32,011
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Forum: OpenFOAM Programming & Development
February 25, 2011, 05:20
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Replies: 123
Views: 32,011
Hello, Alex,
sounds like an explanation...
Hello, Alex,
sounds like an explanation to me. So the conclusion is, the k-Omega-SST turbulence model overpredicts lift values using your current setup. For the fully turbulent case it should...
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Forum: OpenFOAM Programming & Development
February 25, 2011, 04:08
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Replies: 123
Views: 32,011
Hello, Alex,
your first results look...
Hello, Alex,
your first results look promising. The reduction of draf actually is expected with any transition model so the much more interesting question would be, how well the current...
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Forum: OpenFOAM Programming & Development
February 24, 2011, 07:48
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Replies: 123
Views: 32,011
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Forum: OpenFOAM Programming & Development
February 24, 2011, 06:50
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Replies: 123
Views: 32,011
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