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free surface elevation upstream the pille - interfoam

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Old   June 12, 2013, 08:57
Default free surface elevation upstream the pille - interfoam
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Pedro Ramos
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Hi...

I'm doing the open channel flow simulation with interFoam solver and I got a exaggerated elevation upstream the cylinder (http://d.pr/i/Ya1d).



I dont't know why... I use these BC to the atmosphere:

alpha 1
{
type inletOutlet;
inletValue uniform 0;
value uniform 0;
}

U:
{
type pressureInletOutletVelocity;
value uniform (0 0 0);
}

p_rgh:
{
type totalPressure;
p0 uniform 0;
U U;
phi phi;
rho rho;
psi none;
gamma 1;
value uniform 0;
}
k
{
type inletOutlet;
inletValue uniform 0.001;
value uniform 1e-11;
}
nuSgs:
{
type zeroGradient;
}
nuTilda:
{
type inletOutlet;
inletValue uniform 0;
value uniform 0;
}

Help me please!

Best regards!
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Old   June 14, 2013, 17:01
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Pedro,

If you can upload your case, I can try to find the problem.

Thanks,
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Old   June 14, 2013, 19:35
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Hello... I already solve the problem... I forget to put the gravity acelleration in the g file

Now, I want to define a logarithmic profile of the velocity in the inlet. Do you know how? I don t want use swak4foam or groovy bc (i can t install it)

Thanks!

Best regards.
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Old   June 18, 2013, 05:55
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Pedro Ramos
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Quote:
Originally Posted by kilroy View Post
Pedro,

If you can upload your case, I can try to find the problem.

Thanks,
Hello. I have a convergence problem and if I do a treeshold with alpha1 between 0 and 1, something very strange happens. See for yourself please: http://d.pr/f/jDJj

You must type: blockMesh, setFields and interFoam.

Best regards.
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Old   October 29, 2013, 10:47
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Hey Pedro, can you tell me, why you set nuSgs to "zeroGradient" instead of just "0" (zero) at the wall?
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