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Slip bc with compressibleInterFoam leads to velocity oscillation

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Old   March 10, 2009, 09:24
Default Dear fellow Foam-Users, I'
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Florian Gruber
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Dear fellow Foam-Users,

I'm currently trying to run an injection mold simulation using a modified version of the compressibleInterFoam-solver, and keep running into stability problems.

The case setup is very basic: phase 1 enters a specified cavity geometry and displaces phase 2 (air), which leaves the domain on the other side via ambient boundaries. The walls of the cavity are set up as noSlip (fixedValue) and slip-bcs. It's only a testcase, so the mesh is purely hex and generally good.

After some time during the calculation, I experience strange velocity patterns normal to all slip boundary walls, which eventually blow up my solution. Does anyone else have similar problems using slip-bcs for a multiphase (vof) simulation?
Any hint or help would be greatly appreciated!

Best regards,
Florian



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Old   March 10, 2009, 09:48
Default Second try with the image, had
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Florian Gruber
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Second try with the image, had a connection timeout...


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Old   March 10, 2009, 10:11
Default Sorry for the triple post, see
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Florian Gruber
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Sorry for the triple post, seems to be a problem with the university gateway. The picture i wanted to show you can be found here:

http://img152.imageshack.us/img152/5688/oscillation.jpg

Best regards,
Florian
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Old   October 18, 2009, 22:58
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Jitao Liu
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Quote:
Originally Posted by florian_gruber View Post
Dear fellow Foam-Users,

I'm currently trying to run an injection mold simulation using a modified version of the compressibleInterFoam-solver, and keep running into stability problems.

The case setup is very basic: phase 1 enters a specified cavity geometry and displaces phase 2 (air), which leaves the domain on the other side via ambient boundaries. The walls of the cavity are set up as noSlip (fixedValue) and slip-bcs. It's only a testcase, so the mesh is purely hex and generally good.

After some time during the calculation, I experience strange velocity patterns normal to all slip boundary walls, which eventually blow up my solution. Does anyone else have similar problems using slip-bcs for a multiphase (vof) simulation?
Any hint or help would be greatly appreciated!

Best regards,
Florian


Dear Florian,

I am interested in the injection molding simulation too. How is it going on? Hoping that we can help each other.

Best wishes,
Jitao
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