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-   -   [GAMBIT] Modify geometry (http://www.cfd-online.com/Forums/ansys-meshing/68256-modify-geometry.html)

jackr84 September 11, 2009 14:46

Modify geometry
 
1 Attachment(s)
Hi,I have a problem. I must divide a muffler (there is a photo) in three parts:
inlet;
porous media;
outlet;
What command should I use? I thinked to do a section with a plane throught doing some vertexs on the face.Can i do this?

-mAx- September 14, 2009 01:32

If your geometry is still a real entity you just have to create a plane, and then split your volume with this plane.
If you have a virtual geometry, then it will be more complex
But nothing is impossible with Gambit... ;)

jackr84 September 15, 2009 02:30

I have a virtual geometry, therefore the command is the same or it is another. Thank you.

-mAx- September 15, 2009 05:19

no, it is not so easy.
you may split edge with vertex
then choose the vertex and split the surface with the vertex, you become an edge which splits your surface.
you do this untill the perimeter of the surface which will split your volume is closed.
Once it is one, you create a surface from all the edges you needed to split surface.
And finally split volume with this wireframed surface
that's it.
After that you will master the split operations
;)

jackr84 September 15, 2009 08:16

ah ok, I'll do this, thank you!!!!

jackr84 September 15, 2009 12:26

it is difficult because the geometry was imported.Can i create planes to split volume in three parts?

-mAx- September 15, 2009 12:35

it only works with real volumes.
what kind of import did you do?
with step I get real volume.
Else you only have 2 splits to do... the first one will be difficult because you don't know how to proceed (I explained you how to), but after it will be "easy"
In your case it is "difficult" because you have many surfaces, so you may try to merge the surfaces, it will just reduce the number of split operations, but you may decrease the surface quality.

jackr84 September 15, 2009 12:54

I have a iges file,getted from a scanner 3d.can i modify the position of muffler?i would change the referiment system

-mAx- September 15, 2009 13:40

iges generates virtual geometry.
you can try to provide me the file (I am only tomorrow at the office, after i have holidays), I will try it out (either to convert it into step from proE, or to split your volumes but I need to know where)
Did you try to use the edges surrounding your volume for splitting? (just create wireframed surface from existing edges)

jackr84 September 16, 2009 02:44

Hi, how do i send to you the file?

-mAx- September 16, 2009 03:21

check your private message


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