Stability of particle laden interfaces of drops flowing through a pore

In applications such as water treatment or oil extraction, drops suspended in an aqueous fluid are injected a porous medium. If their surfaces laden with solid particles, the may lose integrity when they pass through narrow pores. We study condition for expulsion of particles experiments which Pickering made to flow constricted capillary tube. show key parameters both thickness lubricating film between drop and tube geometrical constraints exerted by on drop.