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

Line Control in Ansys Meshing

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 16, 2009, 10:19
Default Line Control in Ansys Meshing
  #1
Oli
New Member
 
Join Date: Jun 2009
Posts: 3
Rep Power: 17
Oli is on a distinguished road
Hi,

I am looking for something in Ansys Meshing that is similar to the "Line Control" in CFX-Mesh (i.e. specify two points in space with difference spacings, and it interpolates along the line connecting them).

The problem is that I have a jet discharging into free space and I need to refine an area that is not aligned with any geometry.

What is the best way to do that in Ansys Meshing (I am using V12.0.1)?.

Thanks,

Oli
Oli is offline   Reply With Quote

Old   June 17, 2009, 16:10
Default Region of influence
  #2
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,663
Blog Entries: 1
Rep Power: 47
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
Perhaps a CFX mesh user has a better migration strategy, but here are two ideas.

You could use “sphere of influence” (look it up in the help). You can string these together to create a wake region…

Or better yet, try the “region of influence”, new at 12.0. This essentially lets you use another geometry of any shape to control the refinement within your primary volume.

The attached image shows how it works. The red parallelogram is not “meshed” but rather used to control the maximum size in the wake region.
Attached Images
File Type: jpg RegionOfInfluence.jpg (85.9 KB, 91 views)
PSYMN is offline   Reply With Quote

Old   June 17, 2009, 16:27
Default
  #3
Oli
New Member
 
Join Date: Jun 2009
Posts: 3
Rep Power: 17
Oli is on a distinguished road
Thanks - it doesn't seem like I can do a graded line control but the region of influence technique might be fine. Many thanks for pointing this out.

I wonder if you could help me out with one more thing. I have created several "named selections" and I would like to put inflation layers on a number of them. The problem is that when I right click Mesh and select Insert > Inflation, it asks me for both a Scope (I put in the named selection, which comprises the faces I want) but it also asks me for a Boundary. The way around it is to select the body and then the faces that you want, but this seems extremely arduous, when I have the faces already grouped in the named selection.

Am I missing a trick?

Oli
Oli is offline   Reply With Quote

Old   November 14, 2010, 22:48
Default +inflation
  #4
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,663
Blog Entries: 1
Rep Power: 47
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
At first, it wants the body that the prisms will go into... then later, when it asks for the boundary, you can select the named selection from the model tree...

But yes, there is an easier way... Instead of inserting this method, you can just left click on the mesh branch... down in the details panel you will see a section about "+Inflation". Expand that and look at the first option... You can select which parts are inflated right there...

Actually there is also a program controlled option so you don't even need to select the prism parts for a named selection... Most people just want the named selections for the inlet and outlet and maybe symmetry plane... These are usually very easy to select. The other surfaces are all just walls and all need inflation. If you setup named selections this way (don't bother with the selecting the walls) and then set inflation to program controlled, it will automatically just put prisms on all the walls without named selections...
PSYMN is offline   Reply With Quote

Old   November 17, 2010, 16:35
Default
  #5
New Member
 
Yarzar
Join Date: May 2010
Posts: 22
Rep Power: 16
ATOTA is on a distinguished road
Hello,

I am in a need to use 'region of influence'. Could you you tell me if Ansys meshing 12.1 has that option and how to use/enable that option?

Thanks
ATOTA is offline   Reply With Quote

Reply


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] Problem with Gmsh nishant_hull OpenFOAM Meshing & Mesh Conversion 23 August 5, 2015 03:09
OpenFOAM15 installables are incomplete problem with paraFoam tryingof OpenFOAM Bugs 17 December 7, 2008 05:41
Regarding FoamX running Kindly help out hariya03 OpenFOAM Pre-Processing 0 April 18, 2008 05:26
[blockMesh] Axisymmetrical mesh Rasmus Gjesing (Gjesing) OpenFOAM Meshing & Mesh Conversion 10 April 2, 2007 15:00
error while compiling the USER Sub routine CFD user CFX 3 November 25, 2002 16:16


All times are GMT -4. The time now is 23:45.