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

How to access mean velocity in LES by UDF

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 12, 2006, 12:34
Default How to access mean velocity in LES by UDF
  #1
sarah_ron2002
Guest
 
Posts: n/a
Dear all,

which command I should use to get the mean velocity and RMS in large eddy simulation?

Thanks!

sarah
  Reply With Quote

Old   December 12, 2006, 13:04
Default Re: How to access mean velocity in LES by UDF
  #2
hugo
Guest
 
Posts: n/a
Sarah

First: Solve>Initialize>Reset Statistics This is to reset previous statistics, first time is not necessary

Second: Solve>Iterate There you have to active: Data Sampling for Time Statistics.

Depend your problem you need some time steps without Statistics before run the Data Sampling.

that's all

Good Luck
  Reply With Quote

Old   December 15, 2006, 02:11
Default Re: How to access mean velocity in LES by UDF
  #3
selvaganesh
Guest
 
Posts: n/a
Dear sarah, which command we have to use to get LES in the viscous panel?
  Reply With Quote

Old   December 15, 2006, 18:19
Default Re: How to access mean velocity in LES by UDF
  #4
sarah_ron
Guest
 
Posts: n/a
in 3d case, you could select from GUi. In command line, use viscous/model/large-eddy-simulation in 2d case, it could be activated through a command, search thsi forum. SOrry I forgot the command.

  Reply With Quote

Old   December 15, 2006, 18:21
Default Re: How to access mean velocity in LES by UDF
  #5
sarah_ron
Guest
 
Posts: n/a
Dear hugo,

Thanks for you reply!

However, I want to get the mean velocity and RMS through UDF and thus I'd like to know which command I need to use.

Regards, sarah
  Reply With Quote

Old   December 20, 2006, 11:44
Default Re: How to access mean velocity in LES by UDF
  #6
justin
Guest
 
Posts: n/a
hi, I have the same problem as you. From my point of view, the mean velocity can be plot in xy plot. As for the RSM, you have to use custom field function, i.e.[u'v']=[uv]-[u][v], but I don't know how to use custom field function calculator.

Do you have any idea about it until now?

Regards Justin
  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
3D UDF Paraboilc Velocity Profile (Can't Maintain) Sing FLUENT 9 November 26, 2014 08:58
UDF for velocity farne FLUENT 1 February 25, 2009 01:29
UDF velocity and temperature Raj FLUENT 3 February 1, 2009 19:29
please help UDF for velocity profile in y-directio raju FLUENT 3 September 22, 2008 16:36
Velocity LES UDF Lourival FLUENT 0 April 15, 2006 07:32


All times are GMT -4. The time now is 07:19.