I would like to know whether rop_s or ro_s should be used in the reaction rate setting of biomass pyrolysis. Are the Settings in the variable density case correct?Looking forward to your reply, thank you!
It should be ROP_s . ROP_s is the bulk density (product of density RO_s times the solids volume fraction. If you use ROP_s, the concentration will be zero if there are no solids in the cell (because the solids fraction is zero). If you use RO_s, you may compute a non-zero concentration even if there is no solids.
Thank you very much for your reply!