CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Main CFD Forum

Zero thickness boundary inside a 3D mesh

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 30, 2004, 05:25
Default Zero thickness boundary inside a 3D mesh
  #1
Tessaratto
Guest
 
Posts: n/a
Does anyone be experienced with modeling a zero thickness wall, like a baffle or a flat plate, inside a 3D meshed domain using GAMBIT?

Thanks.

Tessaratto
  Reply With Quote

Old   August 30, 2004, 05:55
Default Re: Zero thickness boundary inside a 3D mesh
  #2
A. Awad
Guest
 
Posts: n/a
have you tried to use an inlet bc with zero velocity
  Reply With Quote

Old   August 30, 2004, 06:35
Default Re: Zero thickness boundary inside a 3D mesh
  #3
Tessaratto
Guest
 
Posts: n/a
Dear A.Awad, thanks for answering. I have the following approaching problem: given a 3D domain in which I put some zero-thick obstacle, let's find out the best (or even a good one) procedure to model it, topologically speaking, and to assign the right b.c. on it! I guess I can't assign neither an inlet bc nor a wall because I have no frontier topology where there is the zero-thick obstacle. I don't know if it's possible to assign a bc inside a generated mesh with GAMBIT's tools. Any idea? Thanks.

T.

  Reply With Quote

Old   August 30, 2004, 08:25
Default Re: Zero thickness boundary inside a 3D mesh
  #4
STK
Guest
 
Posts: n/a
hello. I understand dwhat you want to do. The only solution to that is the interior b.c. and afterwards in fluent you characterize it as a wall b.c. i have done it. The problem is that you have to connect this edge with others (it has to be meshed), so there will not be totally interior. But you can split this edge to 3 for example edges, which two of the will be just interior and the internal edge wall b.c.
  Reply With Quote

Old   August 30, 2004, 09:10
Default Re: Zero thickness boundary inside a 3D mesh
  #5
Tessaratto
Guest
 
Posts: n/a
Hi STK, thanks for answering. I agree with u talking about generating an interior b.c. to define my problem. I'd like to better understand if i should disconnect the zero thick wall surface from the 3D domain before generating mesh or if i should try to mesh the two-sided wall in different manner to obtain an interior b.c. entity importing the mesh into fluent. I've not clear idea about procedure to generate this obstacle. You talked about disconnected edges. Don't you generate also the faces delimiting the obstacle? Suppose my obstacle is a rectangular solid plate immersed in a generic 3d fluid domain. Could you please give me a synthetic procedure to model it?

Nice of you.

Tessaratto
  Reply With Quote

Old   August 30, 2004, 18:37
Default Re: Zero thickness boundary inside a 3D mesh
  #6
stk
Guest
 
Posts: n/a
hi! try meshing the two-sided wall to obtain an interior b.c., which will be a zero thickness wall, because you will create a surface and not a volume. good luck
  Reply With Quote

Old   September 5, 2004, 13:51
Default Re: Zero thickness boundary inside a 3D mesh
  #7
Tessaratto
Guest
 
Posts: n/a
Hi STK, I've built mesh on the two-sided wall but don't know how to create the volume mesh because the topology "doesn't feel" the disconnection inside. Any other suggestion will be appreciated. Thanks. Tessaratto
  Reply With Quote

Reply

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
2D Mesh Generation Tutorial for GMSH aeroslacker Open Source Meshers: Gmsh, Netgen, CGNS, ... 12 January 19, 2012 04:52
snappyHexMesh won't work - zeros everywhere! sc298 OpenFOAM Native Meshers: snappyHexMesh and Others 2 March 27, 2011 21:11
boundary conditions and mesh exporting vaina74 Open Source Meshers: Gmsh, Netgen, CGNS, ... 2 May 27, 2010 09:38
RPM in Wind Turbine Pankaj CFX 9 November 23, 2009 05:05
How to control Minximum mesh space? hung FLUENT 7 April 18, 2005 09:38


All times are GMT -4. The time now is 22:10.