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

[ICEM] Several problems with turbomachinery grid generation

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

LinkBack Thread Tools Display Modes
Old   March 17, 2011, 19:19
Default Several problems with turbomachinery grid generation
New Member
Join Date: Feb 2011
Posts: 20
Rep Power: 8
Mitpostdoc is on a distinguished road
Hello there,
since the last week I have been struggling with the grid of a centrifugal compressor. I have been asked to mesh it with a structured mesh and for a single impeller-return channel passage and run the simulation in Fluent.
Unfortunately, I am having a very hard time with ICEM... I tried to break down my difficulties in few questions:

1) Periodic boundaries:

- I must manually define the planes for the periodic boundaries. Unfortunately, if I use the Mesh>Global Mesh parameters> Set up periodicity of ICEM the program does not understand the geometry. The Impeller blades are bending backwards and ICEM does not "see" that. I had to manually create the periodic planes and move the blocks vertices one by one. Is there any other more clever way to do that?

- Multiple periodicity. This is probably the worse limitation. I can specify only 1 rotational angle of periodicity . However, the impeller and the return vanes have a different angle. I do not see any solution . Any idea how to solve it ?

2)Sliding mesh:

- I can not see any reference in the ICEM manual to sliding/rotating interfaces. I did not find anything in the tutorial either. How does it work?

Finally, Icem is crashing every 5 minutes. That happens if I delete a block and I try to undo, or simply while I am rotating the view. Is that normal?

Thanks you
Mitpostdoc is offline   Reply With Quote


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
elliptic grid generation (orthogonal) vasu Main CFD Forum 8 October 28, 2015 16:20
Grid Generation Raghunandan K.V. Main CFD Forum 2 October 4, 2008 09:26
elliptic grid generation prapanj Main CFD Forum 1 November 19, 2007 17:53
Two problems about interface and refined grid peter.zhao FLUENT 0 August 21, 2006 10:59
Grid generation time in CFX5 zahid CFX 1 June 9, 2003 09:19

All times are GMT -4. The time now is 01:35.