[Jack_lumber]

Hi everyone!

I'm trying to model gasification and combustion in a fluidized bed in Fluent.
I've defined the rate of the reactions into the "phase interaction" panel through the use of UDFs.

The kinetics work fine for the primary phase (gas phase composed of co,co2,h2,h2o,o2 and argon) I obtain good results for the species in the primary phase i.e. for h2o gasification the h2o mole shrinks and h2 and co are produced.

However, the model doesn't work for the secondary phase consisting of only pure carbon. When the reactions take place, the carbon content increases instead of decreasing.

Any suggestions? Anybody experienced/resolved the same issue?

cheers