[fireFoam] analysing heat flux
 

I have run a pyrolysis simulation that lasts around 2 minutes, and now I'm trying to get the values of the total heat flux (kW/m²) at certain points in the field.
I've read many threads about the variables that the solver calculates and certain ones aren't defined clearly in the openfoam websites (like Qdot) and I'm having a hard time to understand which variables allow me to get the heat flux values.

can someone clarify more what do these mean? :

qin
qr
Qdot
G
ILambda_ (from 0_0 to 31_0)