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

y+

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 17, 2009, 15:09
Default y+
  #1
Gustavo
Guest
 
Posts: n/a
does someone know how to monitor the y+ near a wall? thanks in advance!
  Reply With Quote

Old   February 18, 2009, 04:19
Default Re: y+
  #2
andy2o
Guest
 
Posts: n/a
Please see:

http://www.cfd-online.com/Forum/cfx_...cgi?read=26957

Regards, andy2o
  Reply With Quote

Old   February 18, 2009, 11:47
Default Re: y+
  #3
cfdguy
Guest
 
Posts: n/a
Try areaAve(yplus)@wall as the Monitor Point. Don't forget to change to expression.

Good luck!
  Reply With Quote

Old   February 18, 2009, 12:08
Default Re: y+
  #4
LKF
Guest
 
Posts: n/a
cfdguy: Have you tested your recommendation? I have tried this exact method and gotten an error in Pre. I have also tried creating a dummy monitor point and then changing the expression using "edit run in progress" once the solver is running and also gotten an error.

If in fact this is working for other people then I would like to figure what I may be doing wrong.
  Reply With Quote

Old   February 18, 2009, 12:43
Default Re: y+
  #5
cfdguy
Guest
 
Posts: n/a
That's it, as I stated.

MONITOR POINT: yplusHood

Expression Value = areaAve(yplus)@box chimney

Option = Expression

END

Are you sure guys you're running a turbulent case?

Cheers!
  Reply With Quote

Old   February 18, 2009, 12:49
Default Re: y+
  #6
LKF
Guest
 
Posts: n/a
Interesting ... and, yes, always running turbulence.

Next run I start, I'll try it again. Just speculating here, but I notice you listed 'yplus' whereas I've tried 'Yplus' and gotten errors, possibly that's the difference. Although 'Yplus' is the variable name listed in the documentation.
  Reply With Quote

Old   February 18, 2009, 12:52
Default Re: y+
  #7
cfdguy
Guest
 
Posts: n/a
Ohh yes, the variables are case sensitive. If you look into the CFX installation dir under /etc subdir you'll find a VARIABLES file. Check inside and you'll find the correct names used by the solver.

Yplus is used by POST, I think.
  Reply With Quote

Old   February 18, 2009, 16:13
Default Re: y+
  #8
Gustavo
Guest
 
Posts: n/a
thanks!! it worked!
  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



All times are GMT -4. The time now is 20:37.