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Hydromechanical Modeling of Unsaturated Flow in Double Porosity Media.
- Source :
-
International Journal of Geomechanics . Dec2016, Vol. 16 Issue 6, p1-18. 18p. 6 Color Photographs, 9 Graphs. - Publication Year :
- 2016
-
Abstract
- Geomaterials with aggregated structure or containing fissures often exhibit a bimodal pore size distribution that can be viewed as two coexisting pore regions of different scales. The double-porosity concept enables continuum modeling of such materials by considering two interacting pore scales satisfying relevant conservation laws. This paper develops a thermodynamically consistent framework for hydromechanical modeling of unsaturated flow in double-porosity media. With an explicit treatment of the two pore scales, conservation laws are formulated incorporating an effective stress tensor that is energy-conjugate to the rate of deformation tensor of the solid matrix. A constitutive framework is developed on the basis of energy-conjugate pairs identified in the first law of thermodynamics, which is then incorporated into a three-field mixed finite-element formulation for double-porosity media. Numerical simulations of laboratory- and field-scale problems are presented to demonstrate the impact of double porosity on the resulting hydromechanical responses. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15323641
- Volume :
- 16
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- International Journal of Geomechanics
- Publication Type :
- Academic Journal
- Accession number :
- 119504915
- Full Text :
- https://doi.org/10.1061/(ASCE)GM.1943-5622.0000558