How to define 'fracDH'

MFiX How to
,
#1

Hello,

I would like to conduct DEM simulations with char combustion (R1: solid + gas → gas + gas, R2: Solid → Gas, R3: Solid → Solid).
I am wondering if there is any guidance how to define ‘fracDH’ for each phase.

In MFiX Example, Char combustion case shows fracDH(0) = 0.2 and fracDH(1) = 0.8. Could you let me know where those fractions are from? or is it just up to user’s choice?

Regards,
Yujeong

#2

Yes, the user must have prior knowledge on how to assign the heat of reaction.