CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   OpenFOAM (https://www.cfd-online.com/Forums/openfoam/)
-   -   What are the 3 numbers in reactingFoam/constant/reactions? (https://www.cfd-online.com/Forums/openfoam/86486-what-3-numbers-reactingfoam-constant-reactions.html)

Scot March 23, 2011 18:20

What are the 3 numbers in reactingFoam/constant/reactions?
 
Hi- in reactingFoam is the file constant/reactions. There is a list called "reactions" and in parentheses there are three numbers (5.2e16 0 14906). Anybody know what these are? Thanks!

smehdi609 March 24, 2011 01:05

Arrhenious coefficients for reaction rate quations.
http://en.wikipedia.org/wiki/Arrhenius_equation

Scot March 24, 2011 08:47

Thank you Mahdi! So 5.2e16 is the pre-exponential factor "A", and 14906 is the activation energy in J/mol, correct? But what is the zero in the middle? Thanx again -Scot

niklas March 24, 2011 10:06

The numbers are (A n Ea)

where
k = A*T^n*exp(-Ea/(R*T))

Scot March 24, 2011 10:18

Excellent! Thank you Niklas, and thank you Mahdi.


All times are GMT -4. The time now is 15:59.