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

Global and local variables

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 11, 2002, 17:19
Default Global and local variables
  #1
Astrid
Guest
 
Posts: n/a
Hi all,

In CFX 5.5 I have run a case with a cilinder from which the outer wall rotates with a certain constant speed. I have run it as a stationary case. The boundary condition on the outer wall is such that the specified u,v,w velocities provide the correct angular velocity.

Now in CFX-Post, when I view the global velocity on the outer rotating wall I obtain a global range between the correct minimum speed (= 0) and about 60-70% of the angular velocity. When I plot the local range I get the correct range between 0 and the angular velocity. (Btw, this does not only apply for the angular velocity, it applies for all variables)

Does anyone know what this difference means? Why is the local range broader than the global range?

Astrid

  Reply With Quote

Old   April 11, 2002, 19:19
Default Re: Global and local variables
  #2
Mike
Guest
 
Posts: n/a
This sounds like it's because conservative values are used for the ranges instead of hybrid. Mike
  Reply With Quote

Old   April 12, 2002, 08:30
Default Re: Global and local variables
  #3
cfd guy
Guest
 
Posts: n/a
It sounds like a code bug for me.


cfd guy
  Reply With Quote

Old   April 14, 2002, 16:51
Default Re: Global and local variables
  #4
Astrid
Guest
 
Posts: n/a
Maybe. But which of them do I see? And where can I swith between both? Where is the button?

I want to be in controlllllll, Astrid

  Reply With Quote

Old   April 14, 2002, 19:02
Default Re: Global and local variables
  #5
Mike
Guest
 
Posts: n/a
Hybrid values aren't available for local ranges in 5.5. I believe 5.5.1 has the option to pick between the two.
  Reply With Quote

Old   April 15, 2002, 06:28
Default Re: Global and local variables
  #6
Michael Bo
Guest
 
Posts: n/a
Toggle between Hybrid (wall boundaries applied) and Conservative values (Raw calculated values) from within the Variable Editor in cfx post 5.5.

Michael Bo
  Reply With Quote

Old   April 15, 2002, 16:46
Default Re: Global and local variables
  #7
Astrid
Guest
 
Posts: n/a
So, it is a bug?
  Reply With Quote

Old   April 16, 2002, 00:50
Default Re: Global and local variables
  #8
Mike
Guest
 
Posts: n/a
I don't think this will make any difference to the values used for local ranges, but you can try it and see.
  Reply With Quote

Old   April 16, 2002, 00:52
Default Re: Global and local variables
  #9
Mike
Guest
 
Posts: n/a
i guess it depends how you define a bug. It's works as implemented, but maybe not how some people would expect it to work.
  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
How to write k and epsilon before the abnormal end xiuying OpenFOAM Running, Solving & CFD 8 August 27, 2013 15:33
Convergence moving mesh lr103476 OpenFOAM Running, Solving & CFD 30 November 19, 2007 15:09
Transient simulation not converging skabilan OpenFOAM Running, Solving & CFD 12 September 17, 2007 17:48
IcoFoam parallel woes msrinath80 OpenFOAM Running, Solving & CFD 9 July 22, 2007 02:58
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 19:07


All times are GMT -4. The time now is 00:21.