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

ANSA Shell Meshing: ortho tria element v/s tria element

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

Like Tree1Likes
  • 1 Post By biagiphil

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 31, 2015, 01:30
Default ANSA Shell Meshing: ortho tria element v/s tria element
  #1
New Member
 
Nandan
Join Date: Jul 2012
Posts: 12
Rep Power: 12
ns_chrys is on a distinguished road
Hi

I work with engines, specifically in the field of engine thermal analysis using CFD. At my company, we use ANSA and StarCCM+

I was going through the ANSA user manual for version 15x. On page 671, the guide mentions "triangular elements" and "orthogonal triangular elements" - they have also provided pictures.

However, no mention is made as to which is better and why. Also, no mention is made regarding a rule of thumb, that will help the ANSA user understand when to use "orthogonal triangular elements" over "triangular elements". I would like to know the answers to these questions. Kindly help.

Thank you
Happy holidays
Regards
ns_chrys is offline   Reply With Quote

Old   January 1, 2016, 03:57
Default
  #2
Member
 
Maries
Join Date: Mar 2010
Location: Cologne, Germany
Posts: 68
Rep Power: 14
rmaries is on a distinguished road
Quote:
Originally Posted by ns_chrys View Post
Hi

I work with engines, specifically in the field of engine thermal analysis using CFD. At my company, we use ANSA and StarCCM+

I was going through the ANSA user manual for version 15x. On page 671, the guide mentions "triangular elements" and "orthogonal triangular elements" - they have also provided pictures.

However, no mention is made as to which is better and why. Also, no mention is made regarding a rule of thumb, that will help the ANSA user understand when to use "orthogonal triangular elements" over "triangular elements". I would like to know the answers to these questions. Kindly help.

Thank you
Happy holidays
Regards
Hi,

In star ccm you can able to create volume mesh independent of the ansa surface mesh. You can able to have the same quality of volume mesh in starccm with triangular and ortho tria elements in ANSA when you don't change any other mesh criteria

Regards
Maries
rmaries is offline   Reply With Quote

Old   January 6, 2016, 06:00
Default
  #3
New Member
 
Philippe BIAGI
Join Date: Jan 2016
Posts: 1
Rep Power: 0
biagiphil is on a distinguished road
Quote:
Originally Posted by rmaries View Post
Hi,

In star ccm you can able to create volume mesh independent of the ansa surface mesh. You can able to have the same quality of volume mesh in starccm with triangular and ortho tria elements in ANSA when you don't change any other mesh criteria

Regards
Maries
Hello,

Indeed, if you wish to use Ansa only to clean up your geometry and then use Star CCM+ to generate the volume mesh, you can use any type of tria elements since Star CCM+ will regenerate the global mesh and uses the initial mesh only as a geometry (like if it would be a STL file).

But you can also use Ansa for the whole meshing process and output directly from Ansa the mesh file ready to be used for the simulation. if so, it is better to use trias rather than ortho trias.
If you use triangular option, Ansa will try to generate equilateral triangular and tetrahedral elements which is a better shape for CFD algorithms.

If you use Ansa for the global meshing process, all this process (surface mesh, boundary layer if you need some and volume elements can be totally automated through the Batch meshing capability of Ansa.


Best regards
Philippe
vangelis likes this.
biagiphil is offline   Reply With Quote

Reply

Tags
ansa, surface mesh, triangulation

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
[Gmsh] 3D Mesh conversion from gmsh-2.5.0 to OpenFOAM Ancioi OpenFOAM Meshing & Mesh Conversion 17 January 9, 2019 00:50
[Other] Mesh Importing Problem cuteapathy ANSYS Meshing & Geometry 2 June 24, 2017 06:29
[Gmsh] Vertex numbering is dense KateEisenhower OpenFOAM Meshing & Mesh Conversion 7 August 3, 2015 11:49
Shell element in squeeze film analysis of MEMS? iskandar ANSYS 0 January 6, 2012 05:35


All times are GMT -4. The time now is 17:25.