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

[ICEM] Converting to unstructured mesh

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

LinkBack Thread Tools Display Modes
Old   April 16, 2014, 18:06
Default Converting to unstructured mesh
New Member
Join Date: Mar 2014
Posts: 6
Rep Power: 4
lcaBR is on a distinguished road
Hey people,

I'm meshing a certain geometry using ICEM and I've managed to make a good hexa grid, checking the pre-mesh quality gives me determinant greater than 0.35.

I've converted to unstructured mesh (gonna use Fluent to simulate) and no problems at all after checking (no overlapping, no negative volumes, perfect).

However, I could not achieve convergence in my simulating, so I decided to come back for a mesh manipulation. My grid had quite low angle values, so I modified some blocks and I've managed to get angles greater than 13.5, which I reckon is ok. I know there is this suggestion to aim for angles greater than 18deg, but I don't think 13.5 will be a problem, would it?

After doing this modification in the pre-mesh, I've converted it to unstructured mesh again, replacing, not merging, the old one. Now I have some few penetrating elements in a region I didn't even touch and which does not have any influence from the region I've changed things. Why is this?

A also noted determinant values were a bit different from the pre-mesh values, which seems weird. Is it normal?

And finally, I exported the mesh to Fluent regardless of the penetrating elements and Fluent reads it fine, not diplaying any error message or bad grid warning when I check. No negative-volume elements. So, would it affect my simulation? Those few penetrating elements found in ICEM but not pointed out by Fluent?

Thanks guys, I'd really aprreciate some insight on this.
lcaBR 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
converting ICEM mesh to OpenFOAM bmikuz OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 9 May 10, 2016 16:47
No layers in a small gap bobburnquist OpenFOAM Native Meshers: snappyHexMesh and Others 6 August 26, 2015 09:38
Moving mesh Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 06:20
[ICEM] Generating Mesh for STL Car in Windtunnel Simulation tommymoose ANSYS Meshing & Geometry 48 April 15, 2013 04:24
Convergence moving mesh lr103476 OpenFOAM Running, Solving & CFD 30 November 19, 2007 15:09

All times are GMT -4. The time now is 17:57.