Well it's a bit more complicated than material properties...

Ok, i'll try to explain everything in details:
Aim of my simulation is to simulate a fire of a peat burning which could have started from peat self ignition - exothermic chemical reactions. Peat is mound in piles in bins.
Any way, my biggest problem now is how to define a combustion, because if self ignition is possible (if not, ignition source can be applied) it would start in the lowest layers, and would spread in shape of 1/4 sphere. Burning should start from smoldering and later, when all of neighboring oxygen is consumed and consumption is faster then oxygen supply to reaction zone, pyrolysis will start. Main question - can i model such a situation with Pyrosim? Is it possible to create such conditions, that burning is starting in the middle of material and spreading in it, consuming oxygen and releasing smoke and heat? I have some more questions, so to be continued...
