# What are the 3 numbers in reactingFoam/constant/reactions?

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 March 23, 2011, 19:20 What are the 3 numbers in reactingFoam/constant/reactions? #1 New Member   Scot Johnson Join Date: Mar 2011 Posts: 25 Rep Power: 8 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!

 March 24, 2011, 02:05 #2 Member   M. Mahdi Salehi Join Date: Mar 2009 Location: Vancouver, BC, Canada Posts: 50 Rep Power: 10 Arrhenious coefficients for reaction rate quations. http://en.wikipedia.org/wiki/Arrhenius_equation

 March 24, 2011, 09:47 #3 New Member   Scot Johnson Join Date: Mar 2011 Posts: 25 Rep Power: 8 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

 March 24, 2011, 11:06 #4 Super Moderator     Niklas Nordin Join Date: Mar 2009 Location: Stockholm, Sweden Posts: 693 Rep Power: 22 The numbers are (A n Ea) where k = A*T^n*exp(-Ea/(R*T))

 March 24, 2011, 11:18 #5 New Member   Scot Johnson Join Date: Mar 2011 Posts: 25 Rep Power: 8 Excellent! Thank you Niklas, and thank you Mahdi.

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