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-   -   [GAMBIT] How to name inner domain in Gambit (http://www.cfd-online.com/Forums/ansys-meshing/125338-how-name-inner-domain-gambit.html)

izna October 23, 2013 10:54

How to name inner domain in Gambit
 
hello..

I have a large domain D.. I have one shape,S ( exotic shape) in my large domain.. I had drawn another small domain,X to surround my exotic shape so that i can mesh finest mesh around this and coarser elsewhere..

In gambit i had done X subtract S, then i retain both faces.. Next I did, D subtract X...

I had meshed my small Domain X finely and the bigger coarse.. everything was fine..

problem is my boundary condition.. what do I name the inner domain?
please help..

-mAx- October 24, 2013 00:51

don't give any name of internal domain.

izna October 24, 2013 02:04

hello
If i do not name it.. In openFoam, it is taken as default Wall..

Please advice.

-mAx- October 24, 2013 02:14

You were talking about inner domain. So I understand a volume.
Then I assume you have wall between your default domain D and you refined domain X.
This is typical connectivity problem.
So you have to connect those surfaces
A picture is always welcomed

izna October 24, 2013 02:16

hi its in 2D..

izna October 24, 2013 02:30

inner shapes are wall..

-mAx- October 24, 2013 08:13

If you are working in 2d then bc are set on edges. (so you have to connect your edges)
I don't see anything on your picture

izna October 24, 2013 14:30

when i do connec the edges i obtain the attached error..

I want wall only the buildings..
i have subtract the small square( domain) from the big domain.. and subtract the buildings from the small square domain..

-mAx- October 25, 2013 00:34

upload your dbs file in a share server, I'll check

-mAx- October 25, 2013 03:40

1 Attachment(s)
Ok as I thought: you didn't have any split.
So:
- go to face substract, and select face.2 as "face", then select all faces (except face .2 and face.1) in "substract faces"

-Now you have only 2 faces: face.2 (the one you generated with substract) and face.1, which you will use for the split

-go to face split, and selet face.2 in "face", and face.1 in "faces"

Now your domain is ready, you can mesh
Attachment 26361

izna October 25, 2013 03:47

hi
you mean now on doing this, i can name my edges and not bother with the inner square?
also in

Quote:

go to face split, and selet face.2 in "face", and face.1 in "faces"
in my version of gambit, i have both as face.. firstone face and secondone also face.. whch one do i put as face2 and which one face1

-mAx- October 25, 2013 04:02

you just have to select the faces:
the first ("face") is the surface from which you want to generate a split.
The other ("faces") is the surface (or surfaces) you want to use for splitting
https://www.sharcnet.ca/Software/Gam...plit_faces.gif

izna October 25, 2013 04:05

So for me
face2 is the first and face1 is the second..

Thankssss

-mAx- October 25, 2013 04:17

Quote:

Originally Posted by -mAx- (Post 458920)
-go to face split, and selet face.2 in "face", and face.1 in "faces"

Also for me...:D

izna October 26, 2013 16:05

Hi max

Hwo do i close my volume?
when i do stitch volume, i got the error of
Quote:


cannot create acis body. is this an open shell?
I have all the required face..:(

-mAx- October 28, 2013 02:02

you have to create each volume and then again the substract and split stuff (but with volume)

izna October 28, 2013 09:13

hi max
thanks for a reply..
When i create volumes.. Ie stitch all my face together.. i obtain the Acis error..:(

-mAx- October 29, 2013 02:56

give me an example


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