[fricha01]

Hi,

I try to understand the physics behind the calculation of the solid reaction rate (RRs).
Do someone known where i can find the equation of RRs ?
I look into c++ guide but i can find the equation.

I think RRs is calculated with an Arrhenius function :

RRs= Aexp(-E/RT) but i think these equation is multiplied by rho to have kg/m3/s but how n (reaction exponent) specified in a pyrolysis case ''wood^n = char + gas" is taking into account ?

Thanks
franck

[mehtab]

Hi Frank,

I m also trying to understand how the reactions are modeled in pyrolysis in fireFoam.

Did you get any success with you problem? If yes, please provide your feedback.

I have taken a tutorial case of OppositeBurningPanel. The reactions are mentioned as below:

species
(
    wood
    char
);

gaseousSpecies
(
    gas
);

reactions
{
    charReaction
    {
        type        irreversibleArrheniusSolidReaction;
        reaction    "wood^4.86 = char + gas";
        A           7.83e10;
        Ta          15274.57;
        Tcrit       400;
    }
}

I want to understand how this irreversibleArrheniusSolidReaction is being used here as I could not find any source code/file for this type of Arrhenius equation. Also if I want to implement a different equation how should i proceed with this?

Thanks
Maqs