10 Scopus citations

Abstract

Haines instabilities are sudden jumps of the fluid interface accompanied by fluid redistribution and a transient pressure response. Haines jumps affect global displacement patterns in porous media, promote fingered invasion, increase fluid trapping, and contribute to hysteretic saturation. Detailed analyses and experimental results show that jumps take place when the pressure-volume response is multivalued across the pore throat, during either advancing or receding tests. This situation emerges in "soft systems" such as liquids with entrapped gas bubbles, compliant substrates, and when multiple menisci interact across the porous networks. Elastic deformations and capillarity combine to form the dimensionless elastocapillary number Nec for a given pore geometry and fluid mixture: a system with elastocapillary number Nec
Original languageEnglish (US)
JournalPhysical Review E
Volume100
Issue number2
DOIs
StatePublished - Aug 27 2019

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