FRAGMENTATION IN RANDOM PORE STRUCTURES

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Abstract
The problem of fragmentation of solid phase in reacting porous structures that consist of d (d = 1,2,3) mutually perpendicular bundles of parallel, randomly overlapping cylindrical capillaries is considered. The evolution of fragmentation with the porosity is studied using a Monte Carlo stimulation procedure which rests in using the trajectories of test particles randomly travelling in the solid phase to identify fragments and determine fragment size and fragment surface area distributions. Our results show that fragmentation occurs at about the same value of pore number density per bundle for all d values. This observation is used to develop a correlation that satisfactorily predicts the extent of fragmentation in 2- and 3-bundle capillary structures using the simulation results for pore structures consisting of a single bundle of overlapping capillaries.