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

Instantaneous pressure and temperature

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 17, 2008, 23:51
Default Instantaneous pressure and temperature
  #1
George Thomas
Guest
 
Posts: n/a
Hi, I'm trying to model IC engine combustion in CFX. I'm trying to specify a variable Heat Transfer Coefficient, and for that I need to get instantaneous pressure and temperature in the model to use in the expression for evaluating HTC. Is there any means by which I can use the instantaneous pressure and temperature at any point in the model during the simulation, to use in the expression for evaluating HTC. Thank You.

George

  Reply With Quote

Old   August 20, 2008, 05:47
Default Re: Instantaneous pressure and temperature
  #2
Terje
Guest
 
Posts: n/a
Hi,

You can introduce a user expression which can be a function of any variable.

e.g

h = 10000[W/(m^2*K)] + 100[W/(m^2*K^2)]*T + 10[W/(m^2*K*Pa)]*p

where T and p are the standard names for temperature and pressure used by CFX. Then you define your define your heat transfer coefficient to be h at the wall.

- Terje
  Reply With Quote

Reply


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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Calculation of the Governing Equations Mihail CFX 7 September 7, 2014 07:27
Water subcooled boiling Attesz CFX 7 January 5, 2013 04:32
Properties of air versus temperature AND pressure Vincent Main CFD Forum 5 July 28, 2008 07:28
Neumann pressure BC and velocity field Antech Main CFD Forum 0 April 25, 2006 03:15
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 06:13


All times are GMT -4. The time now is 04:33.