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

CP values higher than 1 in fluent simulations

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 19, 2007, 05:59
Default CP values higher than 1 in fluent simulations
  #1
farhan
Guest
 
Posts: n/a
I'm simulating truck cabin and side rearview mirror in 3D using Fluent. The problem I'm facing is that the cp values at the front part (Stagnation) are higher than 1. Can anybody anhave the answe rfor that?
  Reply With Quote

Old   June 20, 2007, 18:50
Default Re: CP values higher than 1 in fluent simulations
  #2
red lemon
Guest
 
Posts: n/a
change reference velocity and area in solve>controls>reference values
  Reply With Quote

Old   June 21, 2007, 19:09
Default Re: CP values higher than 1 in fluent simulations
  #3
farhan
Guest
 
Posts: n/a
there is no area or velocity given in Solve>controls>reference values
  Reply With Quote

Old   June 22, 2007, 04:40
Default Re: CP values higher than 1 in fluent simulations
  #4
red lemon
Guest
 
Posts: n/a
sorry its in report>reference values change the defaults to be specific to your case and the reporting will use these values in the calculation for cp, cl, cd etc
  Reply With Quote

Old   June 22, 2007, 05:51
Default Re: CP values higher than 1 in fluent simulations
  #5
Luca
Guest
 
Posts: n/a
What value you get? much higher than 1? or very close (about 1.1/1.2) Luca
  Reply With Quote

Old   June 22, 2007, 06:18
Default Re: CP values higher than 1 in fluent simulations
  #6
farhan
Guest
 
Posts: n/a
Its not that high. its around 1.13 and for some cases its around 1.1
  Reply With Quote

Old   June 22, 2007, 06:19
Default Re: CP values higher than 1 in fluent simulations
  #7
farhan
Guest
 
Posts: n/a
yeah I know that, and I have used the values according to reference values of my problem
  Reply With Quote

Old   June 22, 2007, 08:01
Default Re: CP values higher than 1 in fluent simulations
  #8
Luca
Guest
 
Posts: n/a
It could be a problem due to the mesh dicretization. I think that if you try to refine the mesh in that region the cp should get closer to 1. But remember: for compressible flow (Mach number higher than 0.3) the Cp is higher than 1. Luca
  Reply With Quote

Old   June 22, 2007, 09:24
Default Re: CP values higher than 1 in fluent simulations
  #9
farhan
Guest
 
Posts: n/a
Yeah! ok Thnx, I'm checking it now.
  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
New computer for CFD simulations using FLUENT Malik1 Hardware 3 August 11, 2010 01:44
HELP:How to get the values of U+ through Fluent in near wall region zhaoxinyu FLUENT 3 April 23, 2010 08:34
Problems in lauching FLUENT Lourival FLUENT 3 January 16, 2008 17:48
Implementing own PDF in to fluent 6.2 and higher Paul FLUENT 0 August 6, 2007 10:47
shear rate values with fluent IƱigo Main CFD Forum 0 October 17, 2005 06:25


All times are GMT -4. The time now is 07:09.