# Specific heat in STAR-CD

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 November 24, 2005, 07:35 Specific heat in STAR-CD #1 Andrew Guest   Posts: n/a I have a problem in definition of specific heat in STAR-CD. Methodology guide says: STAR-CD offers input of "mean specific heats". Online help for POLYNOMIAL input says: calculate the "specific heat" Cp as a polynomial function of temperature. Online help for USER-CP coding says: supply desired variations of "mean Cp and Cv" in subroutine SPECHT. The difference between "specific heat" and "mean specific heat" is not clear. Post-processing in Prostar has options for plotting any of them. When I define Cp for ideal gas in polynomial form, the plotted values of "specific heat" are true, but the plotted values of "mean specific heat" are sligtly different. How should I treat POLYNOMIAL input of Cp? Can anybody help?

 November 26, 2005, 02:03 Re: Specific heat in STAR-CD #2 DB Guest   Posts: n/a I also have the same doubt "What is the difference between specific heat and mean specific heat in starCD" DB

 November 28, 2005, 04:01 Re: Specific heat in STAR-CD #3 Richard Guest   Posts: n/a If h is the enthalpy, then the specific heat is dh/dT whereas the mean specific heat is h/T. Or perhaps (h - h_ref)/(T - T_ref) ...

September 3, 2009, 23:33
#4
New Member

zhll
Join Date: Apr 2009
Posts: 4
Rep Power: 9
Quote:
 Originally Posted by Richard ;170236 If h is the enthalpy, then the specific heat is dh/dT whereas the mean specific heat is h/T. Or perhaps (h - h_ref)/(T - T_ref) ...
hi Richard and all,about 3 years later.
what h_ref and T_ref mean ? where and how to define them ?
Thanks for any replies .

(sorry for my poor english)

maolu

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post agg Fluent UDF and Scheme Programming 7 May 3, 2013 09:17 Duan J Q CD-adapco 2 November 20, 2007 07:59 grzesiek FLUENT 2 February 16, 2006 12:18 Andrea CFX 1 May 30, 2004 01:55 gino FLUENT 3 November 23, 2001 00:16

All times are GMT -4. The time now is 18:09.

 Contact Us - CFD Online - Top