CFD Online Logo CFD Online URL
Home > Forums > ANSYS Meshing & Geometry

[ICEM] Creating 3D mesh in ICEM with defined boundaries

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

Like Tree2Likes
  • 2 Post By PSYMN

LinkBack Thread Tools Display Modes
Old   August 27, 2012, 22:09
Unhappy Creating 3D mesh in ICEM with defined boundaries
Hugh Ingham
Join Date: Aug 2012
Posts: 35
Rep Power: 5
martyn88 is on a distinguished road
Hi everyone,

I am having trouble creating a 3d mesh for a LES simulation I am doing for a supersonic free jet. I have created a 2D geometry and structured mesh in ansys (find attached) and am quite happy with it. Being LES, I need a 3d mesh, so I now need to revolve it 45 degrees to make a 1/8th section. I am running the simulation using OpenFOAM but doing the meshing and geometry in ansys. However I need to define the boundaries in ansys so that when I export it to OpenFOAM it recognises them and BC's can be applied.

I need to define an inlet surface, the nozzle wall surface, and the freestream surface. Also I need to set up a cyclic pair on each side surface (periodic in the circumferential direction).

I exported the 2d mesh from ansys in .msh format then imported it to ICEM and extruded it to 3D (also attached) and it looks great, however I need to redefine the boundaries. Is there any way of defining boundaries at this stage? Or do I have to define them on the geometry?

I'm super confused, what is the best way to do this!!!!!!

2d geometry.JPG

2d mesh.jpg

3d ICEM mesh.jpg
martyn88 is offline   Reply With Quote

Old   August 28, 2012, 08:09
Super Moderator
diamondx's Avatar
Ghazlani M. Ali
Join Date: May 2011
Location: Canada
Posts: 1,291
Blog Entries: 23
Rep Power: 20
diamondx will become famous soon enough
If i'am not wrong, Boundaries has to be defined in geometry, then associated to the edge in a structured mesh. once the .msh is created, it's too late.
New to ICEM CFD, try this document -->
diamondx is offline   Reply With Quote

Old   August 28, 2012, 08:46
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
It would have been easier to name the edges before you generated the initial mesh, but it is not too late. It is just a little more effort.

In the display tree, right click on parts to create a new part. Lets call the first one "INLET".

Then with only shell elements displayed, go over to that are of the model and select the shells you want to put into that part.

There are lots of selection tools to help you get just the ones you want. For instance, you could use a polygon (p) or a box, or your could select a single element on a face and floodfill to angle. You can even set the angle, but I think the default of 30 degrees should work fine in your case.
Far and diamondx like this.
Please help guide development at ANSYS by filling in these surveys

Public ANSYS ICEM CFD Users Survey

This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)...

CFD Online Users Survey
PSYMN is offline   Reply With Quote

Old   September 9, 2012, 10:43
Hugh Ingham
Join Date: Aug 2012
Posts: 35
Rep Power: 5
martyn88 is on a distinguished road
Thanks for the help guys, I ended up using ansys mesher and defined the cyclic boundaries using fluent.

martyn88 is offline   Reply With Quote

Old   September 9, 2012, 15:42
New Member
Join Date: Aug 2012
Posts: 21
Rep Power: 5
samidabest is on a distinguished road
( i make the 2d model of shell and tube heat exchanger and mesh it but when select heat exchanger model in fluent it give error that primary and auxiliary regions are not overlapping ..... so plz help me what i do .... i'm new to use ansys
samidabest is offline   Reply With Quote


3d mesh, cyclic side wall, icem 3d, open foam

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
converting ICEM mesh to OpenFOAM bmikuz OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 8 May 2, 2013 10:55
Layers:problem with curvature giulio.topazio OpenFOAM Native Meshers: snappyHexMesh and Others 10 August 22, 2012 09:03
[ANSYS Meshing] Question about ICEM mesh output to CFX lnk ANSYS Meshing & Geometry 0 July 27, 2012 15:39
[ICEM] Problem making structural mesh on a surface froztbear ANSYS Meshing & Geometry 1 November 10, 2011 09:52
ICEM CFD 5.1 Hex-Tet mesh merging failure bogesz CFX 1 January 29, 2005 07:46

All times are GMT -4. The time now is 02:02.