CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Mesh Generation & Pre-Processing Software > ANSA

Does Ansa have a "volume skew" criterion equivalent?

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

Like Tree1Likes
  • 1 Post By rmaries

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 13, 2022, 14:03
Default Does Ansa have a "volume skew" criterion equivalent?
  #1
New Member
 
Join Date: May 2022
Posts: 2
Rep Power: 0
Jazaira is on a distinguished road
Hi,
I am trying to reduce the number of tet elements that fail a certain criterion in Hypermesh (about 1% of my mesh). This criterion is called "volume skew" (with a value of 0.9) in hypermesh, but I am trying to modify the mesh in Ansa, so I need to be able to select the equivalent of what this criterion is in Ansa. This is the hypermesh definition of "volume skew" https://ibb.co/VvQFZBc

The first thing I tried in Ansa was to use "Skewness" for solids, but looking at the description below, you can see that it seems different, and it gave me wrong/opposite results when I tried to fix the elements. https://ibb.co/ZGj1Jjb. Essentially, the more elements I fixed in Ansa using this criterion, the more failed elements I got in hypermesh when re-checking, making my mesh worse.

The second thing I tried in Ansa was to use "h-ratio" for solids https://ibb.co/KjWrKNN, but when I use a value of 0.9, the entire mesh is highlighted as failing the criterion, instead of just a portion of them (should be about 1% according to hypermesh).

Any help is appreciated.
Thanks,
Jazmine
Jazaira is offline   Reply With Quote

Old   May 14, 2022, 13:07
Default
  #2
Member
 
Maries
Join Date: Mar 2010
Location: Cologne, Germany
Posts: 75
Rep Power: 16
rmaries is on a distinguished road
Hi,

For skew, I believe fluent skew in Ansa has similar definition.
In ansa quality criteria, go to solids tab, enable only skew and go to dropdown and select fluent. You can see the quality criteria definition by hovering the mouse over that quality.

Maries
Jazaira likes this.
rmaries is offline   Reply With Quote

Old   May 17, 2022, 18:30
Default
  #3
New Member
 
Join Date: May 2022
Posts: 2
Rep Power: 0
Jazaira is on a distinguished road
Quote:
Originally Posted by rmaries View Post
Hi,

For skew, I believe fluent skew in Ansa has similar definition.
In ansa quality criteria, go to solids tab, enable only skew and go to dropdown and select fluent. You can see the quality criteria definition by hovering the mouse over that quality.

Maries
Hi,
Thanks for replying. Changing the Skewness definition from Nastran to Fluent made the criteria definition match what I was looking for.

-Jazmine
Jazaira is offline   Reply With Quote

Old   May 19, 2022, 07:42
Default
  #4
Member
 
Maries
Join Date: Mar 2010
Location: Cologne, Germany
Posts: 75
Rep Power: 16
rmaries is on a distinguished road
Yes. they have separate quality crieteria for surface elements & Volume elements. Press F11 the menu will open, you can see shells and solids in different tabs.
rmaries is offline   Reply With Quote

Reply

Tags
element quality, hypermesh, skewness, tet mesh, tetrahedral mesh

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ansa batch mode for already running ansa window Viswa ANSA 5 May 21, 2020 15:08
Ansa Python Scripting Renu123 ANSA 2 August 29, 2017 03:46
Equivalent length of helical coil Jeffreyb723 Main CFD Forum 0 August 18, 2017 22:26
Stopping criterion for outer iteration loop luftraudi Main CFD Forum 3 February 22, 2017 08:59
Asymptotic stopping criterion is not working rob50904 STAR-CCM+ 2 January 28, 2013 08:25


All times are GMT -4. The time now is 20:47.