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

Scot · March 23, 2011, 18:20

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.

March 23, 2011, 18:20	What are the 3 numbers in reactingFoam/constant/reactions?	#1
Scot New Member Scot Johnson Join Date: Mar 2011 Posts: 25 Rep Power: 15	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!

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March 24, 2011, 01:05		#2
smehdi609 Member M. Mahdi Salehi Join Date: Mar 2009 Location: Vancouver, BC, Canada Posts: 50 Rep Power: 17	Arrhenious coefficients for reaction rate quations. http://en.wikipedia.org/wiki/Arrhenius_equation

March 24, 2011, 08:47		#3
Scot New Member Scot Johnson Join Date: Mar 2011 Posts: 25 Rep Power: 15	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, 10:06		#4
niklas Super Moderator Niklas Nordin Join Date: Mar 2009 Location: Stockholm, Sweden Posts: 693 Rep Power: 29	The numbers are (A n Ea) where k = AT^nexp(-Ea/(R*T))

March 24, 2011, 10:18		#5
Scot New Member Scot Johnson Join Date: Mar 2011 Posts: 25 Rep Power: 15	Excellent! Thank you Niklas, and thank you Mahdi.