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[GAMBIT] Different of union, split, and subtract

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Old   February 18, 2014, 23:35
Default Different of union, split, and subtract
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Erlanda Pane
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Excuse me,
Hello everybody, I need your help about drawing geometry.
Which one the better of union,split, or subtract to make one geometry which has two volumes or zones and connected each other ?
Thank you.
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Old   February 19, 2014, 01:32
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it depends on your geometries
display them and tell how you want to mesh them
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Old   February 19, 2014, 02:01
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https://www.facebook.com/photo.php?fbid=10200689615881072&set=a.13516785302 97.44192.1781414203&type=1&comment_id=2496227&offs et=0&total_comments=3&ref=notif¬if_t=photo_comment

I want mesh them with different mesh, but I want they are connected each other. Thank you
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Old   February 19, 2014, 02:52
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no facebook access from office
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Old   February 19, 2014, 03:23
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Iam sorry.
How to upload image without facebook link ?
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Old   February 19, 2014, 03:34
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by clicking on "Go Advanced" you have more possibilities for editing (attachment for example)
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Old   February 19, 2014, 04:18
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Capture1.PNG

This is my geometry, thank you.
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Old   February 19, 2014, 04:23
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Is volume 2 a solid or a fluid domain?
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Old   February 19, 2014, 04:27
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volume 2 is a fluid domain.
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Old   February 19, 2014, 04:33
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do you have someting between volume 1 and 2?
Is volume 2 included in volume 1?
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Old   February 19, 2014, 04:44
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Yes, between volume 1 and volume 2, there is porous media.
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Old   February 19, 2014, 04:51
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then you need a third volume for modeling this porous zone
your fluid flows through volume 1 , then porous, then volume 2
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Old   February 19, 2014, 05:19
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oh, thank you.
Where is the position of third volume ?
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Old   February 19, 2014, 07:13
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between both volumes, but that should you know (don't you have a cad sketch or whatever?)
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Old   February 19, 2014, 20:18
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Ok, thank you
Which one the better of union,split, or subtract when I finished three volume to connected them ?
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Old   February 20, 2014, 00:33
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if "contact" surfaces match them together you only have to connect faces. It means Gambit will connect "contact" face from volume 1 with "contact" face from volume 2 and will merge both surfaces. Finally you will have a common face betwenn volume 1 and volume 2.
But it will only work if both contact surfaces are exactly the same.
Did you build the geometry in Gambit or from cad package?
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Old   February 20, 2014, 03:45
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Yes, I build the geometry in Gambit.
I hope it works.
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Old   February 20, 2014, 06:12
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did you build your geometry from a paper? if yes, can you display it?
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Old   February 20, 2014, 07:02
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Yes, I will display it.
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Old   February 20, 2014, 08:11
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has your porous zone 0-thickness?
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