CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

Mesh Independence

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

Like Tree2Likes
  • 1 Post By lcarasik
  • 1 Post By LuckyTran

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 29, 2017, 20:41
Default Mesh Independence
  #1
New Member
 
Sebastián Barragán
Join Date: Apr 2016
Location: Bogotá, Colombia
Posts: 14
Rep Power: 9
sebastianbn is on a distinguished road
Hey!

I made a mesh independence study in order to define the coarse mesh that throughs the same solution as a finer one. After knowing the element size that works to me, I had to make a change on the grid (changing it to an O-grid).
Does this mean I have to do my mesh independence study again? Or could I extrapolate the results obtained before to my new case? (Geometry has always stayed the same).

Thanks in advance.
sebastianbn is offline   Reply With Quote

Old   March 29, 2017, 21:07
Default
  #2
Senior Member
 
Lane Carasik
Join Date: Aug 2014
Posts: 692
Rep Power: 14
lcarasik is on a distinguished road
Quote:
Originally Posted by sebastianbn View Post
Hey!

I made a mesh independence study in order to define the coarse mesh that throughs the same solution as a finer one. After knowing the element size that works to me, I had to make a change on the grid (changing it to an O-grid).
Does this mean I have to do my mesh independence study again? Or could I extrapolate the results obtained before to my new case? (Geometry has always stayed the same).

Thanks in advance.
In short, yes. Any meaningful change to a meshing strategy such as switching to an O-grid requires you to redo a study.
sebastianbn likes this.
lcarasik is offline   Reply With Quote

Old   March 29, 2017, 23:19
Default
  #3
Senior Member
 
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,654
Rep Power: 65
LuckyTran has a spectacular aura aboutLuckyTran has a spectacular aura aboutLuckyTran has a spectacular aura about
Yes, redo it. Changing grid topology is also an important change in grid characteristics.

For example, you can imagine I keep the same cell sizes but I draw them stupidly and put skewed cells everywhere such that the solution always diverges.
sebastianbn likes this.
LuckyTran is offline   Reply With Quote

Reply

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
Transient mode simulation (VoF model) mesh independence study problem yulu FLUENT 4 September 20, 2016 18:30
[snappyHexMesh] No layers in a small gap bobburnquist OpenFOAM Meshing & Mesh Conversion 6 August 26, 2015 10:38
[snappyHexMesh] Layers:problem with curvature giulio.topazio OpenFOAM Meshing & Mesh Conversion 10 August 22, 2012 10:03
[snappyHexMesh] external flow with snappyHexMesh chelvistero OpenFOAM Meshing & Mesh Conversion 11 January 15, 2010 20:43
Mesh Independence - Valid Strategy? Ianto Main CFD Forum 2 August 31, 2009 05:36


All times are GMT -4. The time now is 11:00.