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(porous)interFoam: Pressure in trapped air

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Old   October 15, 2014, 04:11
Default (porous)interFoam: Pressure in trapped air
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Peter
Join Date: Apr 2014
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Hi Foamers,

I'm trying to simulate the filling of a cavity, which is a porous zone. This cavity is initially filled with air. In the middle of the cavity, there is an obstacle, that creates an air trap.
Now, as I defined a pressure of 0 Pa on the outlet, which persists in the air filled zone, I would expect the trap to be filled up with liquid. At least, this is what Pam-RTM simulates and what happens in experiment.

But, after the air is trapped, its pressure increases suddenly and stops the flow from advancing.

Why does that happen?

I attached a sketch and my case (to be run blockMesh and porousInterFoam).

Thank you, Kind Regards

Peter
Attached Images
File Type: jpg HufeisenDruckPamOFCFD-online.jpg (30.8 KB, 104 views)
Attached Files
File Type: gz SepHufeisenNewMeshCFD-online.tar.gz (4.9 KB, 31 views)

Last edited by John Degenkolb; October 15, 2014 at 08:35. Reason: changed attached picture so no unpacking necessary
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