Coal Seam Gasification

hi there!

Hi there,

I am masters student, i am working on Coal Gasification. Need not to say very much new to fluent. I wish to study mass transfer when reactant gas (H2O) passed over coal seam. Can any one suggest which model should i use, well, i am not sure whether Multiphase model or descrete phase (Or even Porous media) model will work.

i will be greatful if anyone could reccomend model to me. with regards ,

Thanks

Ron