[amin_jalalian]

Hi
You know we have some devolatilisation models as constant rate model, single reaction, two competing reactions, CPD, FLASHCHAIN,FG-DVC.
In Openfoam we have 2 model only, two simplest models, constant rate and single reaction. They are too simple models and are not accurate.
Does anyone have written a better model for O.F. ?
thanks.

[amin_jalalian]

Does any one know the units of A1 & E in the single KineticRateDevolatilisationCoeffs --> volatileData portion?
for example (CH4 12 0.5) // (name A1 E)

[Junjun Guo]

Hi Amin,

Did you get more devolatilisation Models? and do you know the units of A1 & E in the single KineticRateDevolatilisationCoeffs.

Thanks,

[GabGar]

I guess units of E are kcal/mol as you can see here: https://www.openfoam.com/documentati...8C_source.html


But I don't know the units of A1, ¿could anyone help, please?

[GabGar]

I found the answer, units are:
Activation Energy E [J/kmol.K]

Pre-Exponential Factor A1 [s⁻1]


You can see that because kinetic constant is defined in /opt/openfoam7/src/lagrangian/intermediate/submodels/ReactingMultiphase/DevolatilisationModel/SingleKineticRateDevolatilisation, as:


// Kinetic rate
const scalar kappa = A1*exp(-E/(RR*T));


Where RR is the Universal Gas Constant, defined in src/OpenFOAM/global /constants/thermodynamic /thermodynamicConstants.C, which units are [J/kmol.K], so, as T are in [K], that means that E units are [J/kmol.K].