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-   -   Specific heat in STAR-CD (http://www.cfd-online.com/Forums/cd-adapco/55024-specific-heat-star-cd.html)

Andrew November 24, 2005 07:35

Specific heat in STAR-CD
 
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?


DB November 26, 2005 02:03

Re: Specific heat in STAR-CD
 
I also have the same doubt "What is the difference between specific heat and mean specific heat in starCD"

DB

Richard November 28, 2005 04:01

Re: Specific heat in STAR-CD
 
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) ...

lucio September 3, 2009 23:33

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):o

maolu


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