Eddy Dissipation Concept model

Reactions I-IV are global steps for gaseous fuel oxidation. Reactions V-VII, are for char oxidation. The single film model is used here, where the particle is consumed via reactions with oxygen (or carbon dioxide) and no reaction occurs in the boundary layer. CO and CO2 are the two products formed at the particle surface. The first four reactions are treated based on the eddy-dissipation concept [8], which assumes that chemical reactions in the gaseous phase occur rapidly and the mean consumption rate of fuel is limited by the mixing rate of fuel and oxidant. The char reactions are treated using kinetic Arrhenius expression. 

The Magnussen model was initially developed for simple, one- or two-step reaction sets, in which all reaction rates are fast relative to the small scale mixing, even though it has found use for more complex systems. Recently, for more complex reaction sets, a new model has been developed (Gran and Magnussen, 1996) called the eddy dissipation concept (EDC) model. This model assumes that reaction occurs in small turbulent structures, called the fine scales. A volume fraction... 

Models Based upon the Concept of Eddy Dissipation... 

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