Hello,everyone!
I’m trying to implement a process where biomass falls from the top of the fluidised bed and mixes with the bed material for combustion, but I’m having some problems:
1.When the stiff chemical solver is enabled, the biomass particles no longer fall down, but are separated on the top(as shown in the figure). And with the stiff chemical solver ticked, the simulation time increases considerably. I would like to ask if there are any parameters in the stiff chemical solver that need to be adjusted?
2. The incoming hot air stream does not seem to heat the room temperature biomass particle.
Here is my procedure, hopefully someone can help me out with my difficulties, thanks a lot!
b0709.mfx (28.9 KB)
usr_rates.f (4.5 KB)
usr_rates_des.f (6.2 KB)