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Forum: OpenFOAM Running, Solving & CFD

April 12, 2013, 04:24

Replies: 51

Outlet boundary condition in interFoam

Views: 18,137

Posted By giack

Hi, I have an uncertain about the boundary...

Hi,
I have an uncertain about the boundary condition used for U in the outlet patch (pressureInletOutletVelocity). Why this BC is used for atmosphere patch?How work this BC? I read some different...

Forum: OpenFOAM Running, Solving & CFD

April 11, 2013, 11:24

Replies: 51

Outlet boundary condition in interFoam

Views: 18,137

Posted By giack

Try to set total pressure instead of fixedValue...

Try to set total pressure instead of fixedValue for inlet and outlet and pressureInletOutletvelocity to U. Also set buoyantPressure for surround.
Your mesh is enough refined?

Forum: OpenFOAM Running, Solving & CFD

April 11, 2013, 11:01

Replies: 51

Outlet boundary condition in interFoam

Views: 18,137

Posted By giack

Can you post the geometry of your problem?What...

Can you post the geometry of your problem?What are the BC that you set for alpha1?

I suggest to view the tutorials of Hassan Hemida: Free surface tutorial using interFoam and rasInterFoam. It...

Forum: OpenFOAM Running, Solving & CFD

April 11, 2013, 10:38

Replies: 51

Outlet boundary condition in interFoam

Views: 18,137

Posted By giack

I don't understand what is you problem...you have...

I don't understand what is you problem...you have a deltap between inlet and outlet?in this case try to set a fixedvalue for the pressure and a pressureInletOutletvelocity for U in both boundary

Forum: OpenFOAM Running, Solving & CFD

April 9, 2013, 08:28

Replies: 51

Outlet boundary condition in interFoam

Views: 18,137

Posted By giack

The answer to both question is yes. I try a more...

The answer to both question is yes. I try a more refined mesh and the behaviour is as expected but there is still a strange behaviour in the first instants of motion, in particulare till 0,3 s. After...

Forum: OpenFOAM Running, Solving & CFD

April 5, 2013, 10:48

Replies: 51

Outlet boundary condition in interFoam

Views: 18,137

Posted By giack

thank you for your reply. The images that I...

thank you for your reply.
The images that I attached represent the pipe plane of symmetry at the outlet. Figure1 represent the solution after 0,1 s. After 0,5 s the solution remain the same as in...

Forum: OpenFOAM Running, Solving & CFD

April 5, 2013, 09:38

Replies: 51

Outlet boundary condition in interFoam

Views: 18,137

Posted By giack

Hi to all, I have a problem with the setting of...

Hi to all,
I have a problem with the setting of the boundary condition in a similar problem.
My case is summarized as follow:
at the initial time t=0 the right wall of a closed tube completely ...

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