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

Adapting the mesh in Fluent

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 13, 2014, 00:39
Default Adapting the mesh in Fluent
  #1
New Member
 
Sudipta Ray
Join Date: Dec 2013
Posts: 2
Rep Power: 0
Sudipta Ray is on a distinguished road
Hi everyone,
I am solving a problem of boundary-layer flow in fluent 13. To apply a particular turbulence model, I need to have a specific range of Y+ value at the wall. But the grid I'm creating in Gambit is not sufficient for it. Thus I'm trying to adapt the mesh via the y+ adaption scheme of Ansys Fluent itself. Is this particularly helpful? Fluent has created some hanging node mesh near the wall. I'm attaching the plot of wall y+ below. Please suggest if this technique is useful or not.
Attached Images
File Type: jpg Wall_y+_plot_lengthwise.JPG (25.6 KB, 46 views)
Sudipta Ray is offline   Reply With Quote

Old   January 18, 2014, 18:12
Default
  #2
LDA
New Member
 
Join Date: Jan 2014
Posts: 5
Rep Power: 12
LDA is on a distinguished road
Yes it is useful. But the mesh element size will increase considerably if you have a poor mesh initially.

Try to use a higher quality mesh generator such as Pointwise. With their special technique it is far effective to modify a BL mesh compared to those in Gambit.

Good luck
LDA is offline   Reply With Quote

Old   January 18, 2014, 18:14
Default
  #3
LDA
New Member
 
Join Date: Jan 2014
Posts: 5
Rep Power: 12
LDA is on a distinguished road
By the way, instead of checking y star check y+
LDA is offline   Reply With Quote

Old   January 19, 2014, 01:19
Default
  #4
New Member
 
Sudipta Ray
Join Date: Dec 2013
Posts: 2
Rep Power: 0
Sudipta Ray is on a distinguished road
thanks LDA, i've meant to upload the y+ plot but somehow accidentally the y* one was uploaded. Also, about the initial mesh quality, I can say the mesh was structured with maximum aspect ratio 11.1 and minimum orthogonal quality 0.585. Is it not good enough, since I've read allowable orthogonal quality 0.5-1 and aspect ratio < 50. What can be said about this?
Attached Images
File Type: jpg Wall_y+_plot.JPG.jpg (92.3 KB, 23 views)

Last edited by Sudipta Ray; January 19, 2014 at 01:28. Reason: attachment
Sudipta Ray is offline   Reply With Quote

Reply

Tags
fluent 13, mesh adaption, turbulence model, wall y+

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
[ICEM] Using Surface Mesh from ANSA for Fluent Sim tommymoose ANSYS Meshing & Geometry 15 March 3, 2016 17:29
[snappyHexMesh] No layers in a small gap bobburnquist OpenFOAM Meshing & Mesh Conversion 6 August 26, 2015 09:38
[ICEM] Improving mesh orthogonality in ICEM or Fluent Harshal ANSYS Meshing & Geometry 0 December 2, 2013 09:04
Can anybody tell me what does fluent do using MESH MOTION? enry FLUENT 0 October 6, 2010 12:54
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 11:55


All times are GMT -4. The time now is 21:54.