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

[ICEM] [FLUENT] 2D Geometry problem when exporting to Fluent - Unwanted walls

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

Like Tree1Likes
  • 1 Post By PSYMN

Reply
 
LinkBack Thread Tools Display Modes
Old   February 8, 2011, 14:31
Default [FLUENT] 2D Geometry problem when exporting to Fluent - Unwanted walls
  #1
New Member
 
Miguel Graša
Join Date: Feb 2011
Posts: 4
Rep Power: 6
MikeTichondrius is on a distinguished road
Good evening,

First of all let me make it clear that I'm a newbie at CFD, this being my first project that requires it, I've so far successfully managed to solve the problems I've faced, but this one has me baffled, I'm afraid!

I've worked using ICEM on a 2D mesh to solve as an axisymmetrical problem. My geometry consists of a vertical cylinder with 2 annular inlets and an outlet which is also annular.I separated the geometry into various rectangular surfaces as shown in the attachment, and then meshed each line in order to obtain a structured mesh.

Now, the trouble sprung when trying to export the mesh to Fluent. I used the output menu to do this. When opening the results in Fluent, it happened that some of the curves I used to define the mesh density showed up as boundaries in Fluent, with the names geom, geom:002 and geom002:shadow. These boundaries group several lines within themselves, seemingly at random, INCLUDING some lines I've also defined as inlets and outlets. This obviously causes problems since I have found no way to delete them, or clear them from the boundary condition list.

Is this a problem with the way I've done things in ICEM or is it fixable in Fluent itself, as in, is there a way to define these lines as virtual (not sure what the proper designation would be here), and if so, won't it cause problems with the lines I DO want to apply BCs in?

Any help will be very much appreciated! Thank you in advance!
Attached Images
File Type: png Camara14.png (2.9 KB, 32 views)
MikeTichondrius is offline   Reply With Quote

Old   February 9, 2011, 14:31
Default
  #2
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,662
Blog Entries: 1
Rep Power: 36
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
You should have walls between different materials (fluids).

Did you mesh this with Hexa? In Hexa, associating edges to curves results in lines. you can delete these with mesh editing, but don't delete them if they separate two regions. Fluent expects line elements to separate regions or it will give a lot of errors and not import the mesh.

Simon
p1990 likes this.
PSYMN is offline   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
[ICEM] Create geometry (iges or step file) from fluent mesh muketa ANSYS Meshing & Geometry 9 Today 09:56
problem of running parallel Fluent on linux cluster ivanbuz FLUENT 11 March 10, 2010 16:13
Isolated walls in heat transfer problem Maria FLUENT 1 August 13, 2007 06:04
Problem in Tutorial problem of fluent Phanindra FLUENT 5 April 17, 2007 09:57
Exporting Gambit to Fluent v4 R.Wilkins Main CFD Forum 2 July 21, 1999 16:05


All times are GMT -4. The time now is 20:15.