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BC for outlet - interFoam - spillway

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Old   June 14, 2017, 03:47
Default BC for outlet - interFoam - spillway
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Kim Le
Join Date: May 2016
Location: Lyon, France
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Hello everyone !

I am working on OpenFOAM 4.1 and I am using interFoam to model a lateral spillway with two exits. See the attached image.

https://drive.google.com/open?id=0B7...TdiekNuNjB1emM

I have tried many set of BC for my outlets. Please see the excel chart. Some words are in French but it is quite explicit.

https://drive.google.com/open?id=0B7...lJiNXc4MmlLSjQ

I am struggling with the fact that :
- either the simulation is doing well but one outlet is not emptying, or the two outlets are have very, very small outflow (such as 0.02 m3/s)
- either the chamber seems to empty in both outlets but it encounters some diverging problem. I am monitoring U and P with fieldMinMax in controlDict and it shows exploding values !

checkMesh does not seem to report anything wrong.

I have tried so many combinations of BC for the outlets that I am starting to wonder if it doesn't come from my mesh.

Please, can anyone help ? I have been working on this case for three months now.
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