CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[GAMBIT] Two faces at interfaces after volume subtraction

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   April 21, 2011, 04:51
Question Two faces at interfaces after volume subtraction
  #1
New Member
 
Mohammad
Join Date: Apr 2011
Posts: 1
Rep Power: 0
smhh is on a distinguished road
Hi pals,
I have a problem when creating geometries in GAMBIT. As you know, volume subtraction command is a useful command in making complex geometries. The problem is when, for example, you subtract two cylinders to build an annulus, GAMBIT creates two faces at the interface! This is undesired, because when you want to set boundary conditions in FLUENT, you can not use coupled for temperature of the interface (This means that you want to specify that the temperatures of solid and fluid phases are similar at the interface).
I usually avoid using volume subtraction in GAMBIT. I mean that I make points, then edges, then faces and then volumes. However this method is very tedious for complex geometries.
One solution is that you delete extra faces one by one. But this method is very exhaustive too! Sometimes you have to select and delete over 100s of faces!
Is there any way to solve this problem? To set GAMBIT in a way that it doesn't create extra faces at interfaces?!
I appreciate your useful comments.
smhh is offline   Reply With Quote

Old   May 2, 2011, 02:41
Default
  #2
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,818
Rep Power: 29
-mAx- will become famous soon enough
If you substract your in-cylinder from the other you are not suppose tho get the inner cylinder anymore.
Can you reproduce your issue with a simple .dbs and post the journal file here.
I will try to check where the problem is
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Reply

Tags
coupled bc, extra faces, gambit, interface, volume subtraction

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
snappyHexMesh won't work - zeros everywhere! sc298 OpenFOAM Native Meshers: snappyHexMesh and Others 2 March 27, 2011 21:11
external flow with snappyHexMesh chelvistero OpenFOAM 11 January 15, 2010 19:43
On the damBreak4phaseFine cases paean OpenFOAM Running, Solving & CFD 0 November 14, 2008 21:14
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 11:55
Axisymmetrical mesh Rasmus Gjesing (Gjesing) OpenFOAM Native Meshers: blockMesh 10 April 2, 2007 14:00


All times are GMT -4. The time now is 04:08.