Abstract
A poroelastic medium, comprising a deformable solid with a saturating fluid, exhibits pressure-driven fluid transport that, via a solid∕fluid coupling, generates stresses in the surrounding solid. In an elastically anisotropic solid, this coupling may lead to interactions between distant fluid elements and, therefore, to complex transport behavior. To examine the impact of elastic anisotropy on poroelastic transport, a simplified phase-field model of fluid imbibition in a weakly anisotropic poroelastic solid is studied. It is found that the rate of imbibition depends on the strength of the crystalline anisotropy as well as the orientation of the crystallographic axes relative to the direction of a propagating fluid front.
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