هسته کوچک شونده – کامسول

This is a tutorial showing how to model a reacting a pellet bed using the shrinking core model. A heterogeneous reaction occurs on the the outer surface of initially solid pellets. The reaction consumes the pellet, such that the solid core shrinks, while an inert porous layer is formed around it. An example of such a process is the reaction at the surface of a carbon particle with the formation of a growing ash layer. Transport through diffusion occurs through the growing porous layer.

The model is relatively complex and is a prototype for a future ready-made interface for these types of problems. The problem here is solved using the extra dimensions functionality to describe the processes in the pellet.