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[GAMBIT] Face boundary in 2d

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Old   July 10, 2013, 01:36
Default Face boundary in 2d
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Hello.

I am modeling a 2d channel in Gambit. I have a face that air enters into the model. I am defining 5 edges for boundaries like wall and pressure inlet and pressure outlet and etc. But after defining the face for air, i can not export mesh for fluent. Is that possible to define face boundary in 2d model? see attached image ( Gambit error and geometry)

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Old   July 10, 2013, 04:28
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No you cannot define face as boundary condition for 2d case. Give pressure condition to two outermost edges instead of four.
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Old   July 10, 2013, 04:37
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Quote:
Originally Posted by Far View Post
No you cannot define face as boundary condition for 2d case. Give pressure condition to two outermost edges instead of four.
You mean i erase two wall boundary edges and define that to pressure inlet boundary? if yes, since we are not defining the wall boundary then is the flow going out of model?
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Old   July 10, 2013, 04:47
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don't set any BC to internal edge.
As Far explained, assign pressure inlet to both outer edges.
If you are running multiphase, you can use your air-face to initialise your vof. For that you need to assign your surface as another fluid domain
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Old   July 10, 2013, 04:50
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Quote:
Originally Posted by -mAx- View Post
don't set any BC to internal edge.
As Far explained, assign pressure inlet to both outer edges.
If you are running multiphase, you can use your air-face to initialise your vof. For that you need to assign your surface as another fluid domain
Yes. My model is multiphase. Can you explain more last sentence?
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Old   July 10, 2013, 04:53
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http://aerojet.engr.ucdavis.edu/gamb...zone_cont_type
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Old   July 10, 2013, 05:01
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yes. Define that wall edges as pressure inlet
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Old   July 12, 2013, 02:10
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I Defined that wall edges as pressure inlet and tested 2d in my model . But in 2d i could not simulate that because every time the flow arrive that boundary, solution is converged!!! and flow not going to outlet (downstream)!!!!

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Old   July 12, 2013, 03:29
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sounds connectivity problem.
can you post picture of velocity contour (with mesh) on this area?
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Old   July 12, 2013, 03:55
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Quote:
Originally Posted by -mAx- View Post
sounds connectivity problem.
can you post picture of velocity contour (with mesh) on this area?
Thank you for your quick reply.
sounds connectivity problem? What is that?
I should say my continuity criteria for residuals is 0.001.
I will send pics for you in private.
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