I am using the eddy dissipation model and have a question about the constants A(4) and B(0.5). What effect will changing either of these constants have on the reaction?

Hi,

The eddy dissipation model calculates the reaction rate as: Rf = -rho*epsilon/k*A*min[mf, mo/so, B*mp/sp]

where mf - fuel concentration, mo - oxidant conc., mp - product conc., so = no*Mo/nf*Mf and sp = np*Mp/nf*Mf

Constant A goes directly into the reaction rate. Constant B is supposed to have an influence on the temperature dependeny of the reaction (mp is linked to the temperature). Lowering B will make the reaction rate more dependent on the product concentration, while increasing it will make the reaction dependent on the fuel and oxidant concentrations.

You will probably have to play around with those two to get anything meaningful out of your calculations. Good luck!

Regards,

Volker

Thanks for clearing that up. I understand what's going on now.