Convective extraction from a porous particle under the effect of point pressure pulses

The recovery of an extractant from a porous particle under the effect of point pressure pulses on its surface is studied. It is assumed that the place of a pressure pulse is determined in a random manner. Different configurations of pores are considered: a single pore that runs through a particle and branched pores that have several mouths. Explicit relationships for the yield of the extractant at each sequential impact are derived. It is found that asymptotic regularities for extractant recovery from pores of various configurations at the final stage of the process differ only by a numerical factor that increases with an increase in the number of mouths and does not depend on the internal structure of pores.