Fingering and strain localization in porous media during imbibition processes

Author:

Zaïm Mohammed12,Ommi Siddhartha Harsha1,Collin Frédéric2,Kotronis Panagiotis1ORCID,Sciarra Giulio1ORCID

Affiliation:

1. Nantes Université, École Centrale Nantes, CNRS, Institut de Recherche en Génie Civil et Mécanique (GeM) Nantes France

2. Département ArGEnCo–Géotechnique, Géomécanique et Géologie de l'Ingénieur Université de Liège Liège Belgium

Abstract

SummaryFingered infiltration of a wetting fluid through a porous network is a widely studied subject in the field of fluid mechanics. However, the effect of this heterogeneous percolation on the response of granular materials, in particular fine‐grained soils, is a poorly investigated and badly understood topic which deserves deep analysis, considering, among others, possible applications in soil remediation and underground energy storage. This paper presents a first application of a new formulation of unsaturated poromechanics based on a phase field approach that allows to characterize on the one hand the occurrence of fingering hydraulic instabilities and on the other one to capture their effects on the irreversible, and possible unstable, deformation of the solid skeleton. The envisaged application concerns the behavior of fine‐grained soils whose dilatant/contractant behavior is more and more attracting the interest of the scientific community both in the fields of experimental research and numerical modeling.

Publisher

Wiley

Subject

Applied Mathematics,General Engineering,Numerical Analysis

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