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periodic boundary condition for one face of a (3D) rectangular duct domain

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Old   April 5, 2013, 04:03
Default periodic boundary condition for one face of a (3D) rectangular duct domain
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Das
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Ayyappadas G
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Hi all,

I am new to CFD and i m simulation on the film cooling on a flat plate, and i used gambit for modelling a 3D rectangular geometry as a domain. The bottom face of the rectangular duct is the taken as the test plate.

I gave the following boundary conditions:-

1. duct inlet > Velocity inlet
2. duct outlet> pressure outlet
3. test plate > wall
4. Top side> wall( opp face of test plate)
5. right side face> symmetry
6. left side face> Periodic

After that i did export > mesh, but the file is not exporting successfully.

It is showing some errors with the periodic boundary condition, they are
warn: boundary entity periodic side shadow does not contain any valid entity and is not written.
error: periodic boundary entities are not specified on the same boundary entity.

please help... what is the error and how can I resolve it...

thanks in advance
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Old   April 5, 2013, 07:39
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andy
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Quote:
Originally Posted by Das View Post
Hi all,

I am new to CFD and i m simulation on the film cooling on a flat plate, and i used gambit for modelling a 3D rectangular geometry as a domain. The bottom face of the rectangular duct is the taken as the test plate.

I gave the following boundary conditions:-

1. duct inlet > Velocity inlet
2. duct outlet> pressure outlet
3. test plate > wall
4. Top side> wall( opp face of test plate)
5. right side face> symmetry
6. left side face> Periodic

After that i did export > mesh, but the file is not exporting successfully.

It is showing some errors with the periodic boundary condition, they are
warn: boundary entity periodic side shadow does not contain any valid entity and is not written.
error: periodic boundary entities are not specified on the same boundary entity.

please help... what is the error and how can I resolve it...

thanks in advance
I suggest you look up the meaning of periodic boundary condition since it requires at least a pair of boundaries.
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