[sphere]

Hello everyone,


I am trying to simulate laminar diffusion flame combustion in fireFoam using not infinitely fast chemistry, as mostly used in the tutorials, but calculating the reaction rates using arrhenius reaction rates. For that, i use the "laminar" combustion model and define Arrhenius parameters A and Ta in constant/reactions. The reaction is a single step, second order reaction. Somehow, the parameters obtained from literature lead to way lower/slower combustion than expected. Both temperature and the conversion are too low.


Does anyone know, why that could be or could give me hints on how I should approach that problem?


The solution does not seem to be greatly mesh dependent. I am using openFoam v2212. Am I right in assuming the units to be m^3/kmol/s for A and K for Ta?