macfly 
March 27, 2013 13:12 
EddyDissipation Model: production rates limiters equations
Let's say we have
from Fluent Theory Guide 14.0 or 14.5, section 7.1.2.3, equation (725), one of the two limiters for production rate of O2 is :
so that
or
Then I read the cited reference in Fluent Theory Guide [Magnussen and Hjertager, On Mathematical Modeling of Turbulent Combustion with Special Emphasis on Soot Formation and Combustion, 1976] and here is the limiting formula for the oxygen (equation (2) of the article):
where is the stoichiometric oxygentofuel mass ratio:
inserting (6) into (5) results in
Comparing (7) with (3) and (4), it looks like Fluent Theory Guide and Magnussen formulas don't match.
Did I go wrong somewhere? Or is there a typo in Fluent Theory Guide?
