I am developing a model for low temperature oxidation of coal , where coal is assumed to be porous medium and the air is coming in contact from one face , the surface oxidation of the oxygen been exothermic results in the following reaction

coal+O2--->CO2+0.1CO+heat

My objective is to study the species formation of carbon monoxide, oxygen consumption and Co2 formation under transient unsteady approach

so the help I need regarding the following are:

1. the Arrhenius equation for oxygen consumption rate r = A*pow(o2_massfraction, n)*exp(-E/(R*T)) has to be added as the oxygen consumption rate . #question where should this equation be included in the fluent GUI.

2. the heat is released as the reaction of coal with oxygen ,the source term of heat is the Q = rho*r*heat of reaction of coal. , #question where should i include this equation as a udf included in the fluent GUI.

3.#question how is the species formed in the reaction included.

regards

Tanmay Dasgupta