CFD Online Logo CFD Online URL
Home > Forums > CFX

Mesh angle and aspect ratio

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

LinkBack Thread Tools Display Modes
Old   August 8, 2013, 12:18
Default Mesh angle and aspect ratio
Karthick Selvam
Join Date: Oct 2012
Location: Germany
Posts: 51
Rep Power: 6
selvam2487 is on a distinguished road
Send a message via Skype™ to selvam2487
Sponsored Links
Hello Friends,

I am doing LES of fluid mixing in T junction using CFX. In ICEM CFD, my mesh angle and aspect ratio are 30.5 and 56.7 respectively. When I started my simulations, I noticed in the out file that the mesh angle being displayed was completely different from what I noticed in ICEM. Could anyone explain what I should do to get a better mesh characteristics during the run of CFX solver? I assume that the mesh statistics (like angle and aspect ratio) displayed in CFX is what counts. In the attached picture, the mesh statistics during the solver run shows a low angle of around 17 for the solid domain (inspite of it being 30.5 in ICEM). During the steady state simulations, I got unphysical behavior (like very high temperatures) in solid domain. What should I do to rectify this problem?Thank you for your help.

Karthick Selvam
Attached Images
File Type: png Aspect ratio.png (4.9 KB, 14 views)
File Type: png Mesh angle.png (5.0 KB, 12 views)
File Type: png Mesh statistics in out file.png (10.8 KB, 11 views)
selvam2487 is offline   Reply With Quote
Sponsored Links

Old   August 8, 2013, 19:06
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 13,737
Rep Power: 106
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
If you are asking how to visualise the mesh so you can find the regions of poor mesh quality - This can be done in either ICEM or CFD-Post. In CFD-Post use the mesh calculator to generate mesh quality variables, then you can view them like any other variable to find regions of poor mesh.

If you are asking how to make ICEM generate a better quality mesh, I have two suggestions:
1) Lots of practise, ICEM is a complex tool and it takes a while to be able to use it fully.
2) Try the geometry and meshing forum.
ghorrocks is offline   Reply With Quote


les, mesh angle

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
Mesh Aspect ratio and Angle star Mesh Generation & Pre-Processing 3 September 7, 2013 02:24
MUSCL shock capturing on high aspect ratio meshes vijay_paul Main CFD Forum 1 September 29, 2012 00:16
Layers:problem with curvature giulio.topazio OpenFOAM Native Meshers: snappyHexMesh and Others 10 August 22, 2012 09:03
Import netgen mesh to OpenFOAM hsieh Open Source Meshers: Gmsh, Netgen, CGNS, ... 32 September 13, 2011 05:50
Normal vector, slope and aspect angle g_niro Main CFD Forum 0 February 2, 2011 18:24

Sponsored Links

All times are GMT -4. The time now is 03:29.