CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   Main CFD Forum (http://www.cfd-online.com/Forums/main/)
-   -   About Rayleigh parameter (http://www.cfd-online.com/Forums/main/8296-about-rayleigh-parameter.html)

Hyun November 2, 2004 09:11

About Rayleigh parameter
 
Hi all.

As you know, Rayleigh criterion is a integration of unsteady pressure fluctuation and unsteady heat release wrote

Ra = integrate (p'* q')

p' means p'(x,t) = p(x,t) - p_mean, and it is calculated directly.

q' means unsteady heat release term.

how can I calculate q' term?

I have read following

q' = rho_u * dhr * vol

where rho_u : density of unburned gas dhr : heat of reaction vol : volume

I have calculated unsteady reacting flowfield and have information about species concentration, flow variables and thermodynamic variables.

How can I get the value of heat of reaction??

please give me advices.


All times are GMT -4. The time now is 10:20.