Imbibition of dry aqueous foams by oil (INVITED)

Abstract eng:
When put in contact with a liquid, dry foams may wick owing to surface-tension-driven flows until reaching equilibrium. This work is devoted to the dynamics of this imbibition process. We consider imbibition of non-wetting liquid, by putting the dry foam into contact with organic oils. Indeed, with the appropriate choice of surfactants, oil spontaneously invades the liquid network of the foam without damaging it. We consider two geometries for the oil: a large oil slick and a filled oil pore. Our experiments show original dynamics for the imbibition which are discussed using the framework of foam drainage.

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