Decrease in particle size due to chemical reaction

[youssef.badran]

Hello,

I would like to simulate a fluidized bed in which particle size decreases over time due to a solid–solid reaction.

Is it possible to model this particle size reduction using Fluent alone or by coupling Fluent with Rocky ? If yes, how can the time-dependent particle diameter be accounted for? 

[jcooper]

Hi Youssef:

For solid fuels with surface reactionand shrinking particles, a typical application is coal combustion modelled with DPM  (Lagrangian particles).  This type of model allows particles to shrink in response to reaction.  For closely-spaced particles, an Eulerian granular approach with Arrhenius-based heterogeneous reactions may be better.  Both are possible with Fluent, but there may be some limitations on what types of reactions can be modelled. 

Rocky is required when more complex particle situations like piling or pouring occur, such as when particles are poured into a hopper.

I hope this helps.

Regards,