Characterizing Dissipation in Fluid-Fluid Displacement Using Constant-Rate Spontaneous Imbibition

TitleCharacterizing Dissipation in Fluid-Fluid Displacement Using Constant-Rate Spontaneous Imbibition
Publication TypeJournal Article
Year of Publication2020
AuthorsPrimkulov, B, Chui,  Y Y, Pahlavan,  A, MacMinn,  W, Juanes, R
JournalPhysical Review Letters
Volume125
Issue17
Date PublishedJan-10-2020
ISSN0031-9007
Abstract

We study fluid-induced deformation of granular media, and the fundamental role of capillarity and wettability on the emergence of fracture patterns. We develop a hydromechanical computational model, coupling a “moving capacitor” dynamic network model of two-phase flow at the pore scale with a discrete element model of grain mechanics. We simulate the slow injection of a less viscous fluid into a frictional granular pack initially saturated with a more viscous, immiscible fluid. We study the impact of wettability and initial packing density, and find four different regimes of the fluid invasion: cavity expansion and fracturing, frictional fingers, capillary invasion, and capillary compaction. We explain fracture initiation as emerging from a jamming transition, and synthesize the system's behavior in the form of a phase diagram of jamming for wet granular media.

URLhttps://doi.org/10.1103/PhysRevLett.125.174503
DOI10.1103/PhysRevLett.125.174503
Short TitlePhys. Rev. Lett.