detailed chemistry EDC model

Jimmy Andersen

Does anyone know which reactor type Fluent uses in the detailed reaction modeling when using the Eddy Dissipation Concept (EDC). In the manual it only states: "In FLUENT, combustion at the fine scales is assumed to occur as a constant pressure reactor, with initial conditions taken as the current species and temperature in the cell. Reactions proceed over the time scale (tau*), governed by the Arrhenius rates of Equation 14.1-8, and are integrated numerically using the ISAT algorithm [290]."

But a constant pressure reactor can be both PSR or plug flow. The theory behind the EDC model states that PSR reactors should be used, but it would probably be a lot easier to reach convergence with a PFR type reactor.

I would like to compare different combustion mechanisms, but which reactor type should I compar them in?