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

[ICEM] Finding the smallest mesh size

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 27, 2009, 05:55
Question Finding the smallest mesh size
  #1
Senior Member
 
Join Date: Apr 2009
Posts: 118
Rep Power: 8
lost.identity is on a distinguished road
Hi,

Is there anyway to find the smallest axial length of a mesh in ICEM?

When I click the edge parameters it does show the maximum spacing along the edge but I really want to know is the smallest axial length of a mesh.
lost.identity is offline   Reply With Quote

Old   May 28, 2009, 07:05
Default Small
  #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
Sure,

Usually the Side 1 and Side 2 are the smallest size on an edge...

If you mean you want to find the smallest edge of all you unstructured elements, then go to Edit Mesh => Display mesh Quality, and select the Min Size 2 criterion... You will get a histogram of min edge sizes (min size per element), but it is not really axial...

If this isn't quite what you want, please refine your question...
PSYMN is offline   Reply With Quote

Old   May 28, 2009, 07:26
Default
  #3
Senior Member
 
Join Date: Apr 2009
Posts: 118
Rep Power: 8
lost.identity is on a distinguished road
Hi,

Thanks for the reply and apologies for the vague question.

What I want is to find the smallest grid node spacing along a particular direction (for example in x-axis direction).

The spacing might not lie on an edge, and the second method you mentioned will give the smallest element in the whole mesh, whereas I want to find the smallest length in x direction.
lost.identity is offline   Reply With Quote

Old   May 28, 2009, 15:26
Default X Size
  #4
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
Oh, I know what you need… not edge length but min dimension in X, Y or Z for each element plotted in a histogram or by color…

Go to “Edit Mesh => Display Mesh Quality” or “Blocking => Pre-Mesh Quality histograms” and set the Criterion to “X Size” or “Y Size” or “Z Size”.

Be sure to set the mesh types so that it isn’t looking at the quads or lines (those may have zero size in some directions).

Apply and you will get a histogram… You can click on columns in the histogram to see where the smallest elements are in that direction. In my case (attached image), I have colored the cut plane by this quality criterion…
Attached Images
File Type: jpg X_Size.jpg (99.4 KB, 39 views)
PSYMN is offline   Reply With Quote

Old   May 30, 2009, 03:38
Default 2Dairfoil balde in gambit
  #5
Member
 
sivaramakrishnaiah
Join Date: Mar 2009
Location: india,pondicherry
Posts: 75
Rep Power: 8
sivarama1 is on a distinguished road
Send a message via MSN to sivarama1 Send a message via Yahoo to sivarama1 Send a message via Skype™ to sivarama1
I am having trouble meshing 2D boundary layers in Gambit. The geometry I am working with is the wind airfoil. I have flow inlet and outlet, and inlet/outlet is planar and roughly rectangular. The entire geometry is a sort of rectangular shaped outer airfoil. I can create but when I use the "View 2D Boundary Layer" tool in Gambit, my boundary layers will not even appear in the selection list and cannot be added by shift-left-clicking on them. Does anyone know why they cannot be added to the list?
__________________
sivaramakrihnaiah
sivarama1 is offline   Reply With Quote

Old   May 31, 2009, 22:39
Default Gambit Thread...
  #6
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
I think you should start a new thread for this Gambit question... It will get less attention at the end of this thread...
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
Smallest mesh size cfd_newbie FLUENT 2 December 5, 2008 06:29
Gambit Unstructed (Tet) Mesh - size control newbie FLUENT 3 August 26, 2008 11:38
Phase locked average in run time panara OpenFOAM 2 February 20, 2008 15:37
Mesh size suailek FLUENT 2 July 26, 2004 17:37
Will jumps of mesh size in FEM cause troubles? tang Main CFD Forum 0 June 19, 2003 10:59


All times are GMT -4. The time now is 03:37.