Fluid-driven deformation of a soft granular material
arXiv:1405.7311 · doi:10.1103/PhysRevX.5.011020
Abstract
Compressing a porous, fluid-filled material will drive the interstitial fluid out of the pore space, as when squeezing water out of a kitchen sponge. Inversely, injecting fluid into a porous material can deform the solid structure, as when fracturing a shale for natural gas recovery. These poromechanical interactions play an important role in geological and biological systems across a wide range of scales, from the propagation of magma through the Earth's mantle to the transport of fluid through living cells and tissues. The theory of poroelasticity has been largely successful in modeling poromechanical behavior in relatively simple systems, but this continuum theory is fundamentally limited by our understanding of the pore-scale interactions between the fluid and the solid, and these problems are notoriously difficult to study in a laboratory setting. Here, we present a high-resolution measurement of injection-driven poromechanical deformation in a system with granular microsctructure: We inject fluid into a dense, confined monolayer of soft particles and use particle tracking to reveal the dynamics of the multi-scale deformation field. We find that a continuum model based on poroelasticity theory captures certain macroscopic features of the deformation, but the particle-scale deformation field exhibits dramatic departures from smooth, continuum behavior. We observe particle-scale rearrangement and hysteresis, as well as petal-like mesoscale structures that are connected to material failure through spiral shear banding.
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- Capillary and Viscous Fracturing During Drainage in Porous Media
- Surface tension and the Mori-Tanaka theory of non-dilute soft composite solids
- Migration, trapping, and venting of gas in a soft granular material
- Critical behavior in porous media flow
- Large poroelasto-plastic deformations due to radially outward fluid injection
- Eulerian simulation of complex suspensions and biolocomotion in three dimensions
- Modeling Multiphase Flow Through and Around Multiscale Deformable Porous Materials