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Porous_jump in fluent

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Old   February 28, 2014, 04:23
Default Porous_jump in fluent
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Erlanda Pane
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Excuse me,
Hello everybody, I have one question.
Why I can't find porous_jump in fluent boundary conditions ?
Thank you for your help.
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Old   February 28, 2014, 05:27
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Hello Erlanda,
it means that for this boundary you can't select this boundary condition.
Can you post some pictures of your system?

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Old   February 28, 2014, 10:38
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Hi Bionico, thank's for your help.
This is my picture when Iam running it with ansys fluent.
Attached Files
File Type: zip tungku10-2.zip (73.3 KB, 3 views)
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Old   February 28, 2014, 13:24
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Are you selecting an internal face? Porous jump is an internal boundary condition, so it can't be used for external faces where inlet/outlet conditions can be applied.
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Old   February 28, 2014, 22:49
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Yes Iam selecting an internal face when I build geometry in meshing process, but When Iam processing in fluent boundary condition, I can't find porous jump in optional.
So, what I must to do ?
Thank you for your help
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Old   March 3, 2014, 06:03
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Hi Erlanda,
I can open your mesh: which boundary condition do you want to define as porous-jump?

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Old   March 3, 2014, 07:23
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Hi, Bionico
The porous_jump in the bottom side of second volume (inlet volume).

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Old   March 4, 2014, 03:29
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Hello Erlanda,
inlet boundary condition can't be defined as porous-jump: it isn't an interior face. About your mesh, I have a doubt when I display it: are the two volumes overlapping?

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Old   March 4, 2014, 05:12
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Hi Bionico.
No, the two volume aren't overlapping.
The second volume inside of the first volume.

After that, I have one question. In above side of second volume, I definied boundary condition was outflow, and I had some problem with outflow and pressure outlet (boundary condition in above side of first volume). Why were the both of them domain, and didn't definition ?

Thank you for your help.
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Old   March 4, 2014, 07:14
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Hi Erlanda,
What you used as mesher? I think you made some mistakes in meshing because I see two disconnected volumes (as I said before I see the interior mesh of the bigger volume overlapping the smaller one), so inlet isn't an interior face: I suggest using a conformal mesh.
Maybe also the problem with outlet boundary is the same.

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Old   March 4, 2014, 08:32
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Hi Bionico.
How can I find conformal mesh menu ?

Thank you.
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Old   March 4, 2014, 08:41
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I usually use DesignModeler + Meshing as pre-processing softwares: in order to obtain a conformal mesh you have to put all the bodies in the same Part. If you create different part, you'll obtain a non-conformal mesh.
If it's not a problem, post your geometry (in Parasolid or Step format).

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Old   March 4, 2014, 08:54
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Hi Bionico.
Anyway I use Gambit software for pre-processing.
Is it possible to find conformal mesh in Gambit ?

Thank you.
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Old   March 4, 2014, 09:40
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I used Gambit in the past, but I don't remember how to create conformal mesh, unfortunately
Check on the Manuals.

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Old   March 5, 2014, 05:06
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Oh, okay.
Thank you Bionico.
I will try it.
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