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

Fluent solver setup

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 11, 2005, 08:24
Default Fluent solver setup
  #1
saran
Guest
 
Posts: n/a
Hi

In a fluid flow problem using k-e turb. model I get good convergence however my drag & force results are very large as compared to experiment. I have checked the grid scaling and corrected but still have large difference. Is there any other parameter(s) feed which I have missed? I will be obliged if any one can guide me through this.

Thanks in advance
  Reply With Quote

Old   April 11, 2005, 08:31
Default Re: Fluent solver setup
  #2
A.S.
Guest
 
Posts: n/a
Check your wall y+, bring it to range of 30-60.
  Reply With Quote

Old   April 11, 2005, 22:22
Default Re: Fluent solver setup
  #3
zxaar
Guest
 
Posts: n/a
check the reference values u have set, are they set properly, if they are not set to correct values, you might see arbit results.
  Reply With Quote

Old   April 12, 2005, 07:25
Default Re: Fluent solver setup
  #4
saran
Guest
 
Posts: n/a
Thanks A.S. & Xzaar, I will try your advise and see the results.
  Reply With Quote

Old   April 12, 2005, 07:31
Default Re: Fluent solver setup
  #5
saran
Guest
 
Posts: n/a
Hi AS

Could you pls guide me how do I adjust y+

Thanks a lot
  Reply With Quote

Old   April 12, 2005, 09:59
Default Re: Fluent solver setup
  #6
A.S.
Guest
 
Posts: n/a
Though y+ adaptation is not prefered, try it. Be careful y+ is based on Cell Centre Distance from wall, not distance of first grid point on the wall. Goto "Resource" section then "Calc" then "Misc". There is a viscous spacing calculator. Give good aprox. values for air foil. Make you near wallmesh based on it (double the value you get)
  Reply With Quote

Old   April 12, 2005, 10:20
Default Re: Fluent solver setup
  #7
saran
Guest
 
Posts: n/a
Thanks a lot AS.
  Reply With Quote

Old   May 2, 2005, 04:40
Default Re: Fluent solver setup
  #8
s.elayanila
Guest
 
Posts: n/a
Sirs,

Actually I did't get solution converged.I'm not sure about the meshing.Is anything impotant for mesh consideration?

Thank you very much.
  Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fluent IcePak - AMG Solver Russ FLUENT 1 December 25, 2013 09:26
Simulation of Mixing in Twin Screw Extruder Using Fluent Solver keenwiz FLUENT 1 August 5, 2013 01:51
On Setring Step Size in unsteady Solver of FLUENT lzgwhy FLUENT 0 August 19, 2009 22:44
Help with XY Plots for 3D Solver in Fluent Iaroslav FLUENT 0 June 26, 2009 12:07
compressible two phase flow in CFX4.4 youngan CFX 0 July 1, 2003 23:32


All times are GMT -4. The time now is 18:17.