The Eddy Break-Up Model

The Eddy Break-Up (EBU) model considers either micro-mixing or the reactions to be rate-determining. The micro-mixing rate and the intrinsic reaction rate, i.e.. 

The original EBU model proposed by Spalding [1971] calculates the micromixing rate for a single second-order irreversible reaction from  

THREE DIMENSIONAL CFD SIMULATION OF FURNACE AND REACTOR TUBES FOR THE THERMAL CRACKING OF HYDROCARBONS 

---

The rate of combustion of hydrogen was assumed to be infinite. Combustion reactions are relatively fast so that micro-mixing limitations have to be accounted for. The Eddy Break-Up model [Spalding, 1972], presented in Section 12.5.3.2, was applied. Using (12.2-4) with a value for Cy of 4, the following mixing rates were obtained for the combustion reactions 1, 2, 3 ... 

---