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Pore-scale simulations of drainage of heterogeneous and anisotropic porous media
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10.1063/1.2772529
/content/aip/journal/pof2/19/10/10.1063/1.2772529
http://aip.metastore.ingenta.com/content/aip/journal/pof2/19/10/10.1063/1.2772529
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Equilibrium distribution of a strongly wetting liquid for three different Bond numbers during drainage of the liquid from a porous medium containing a microfracture: (a) vertically oriented fracture and (b) horizontally oriented fracture. Liquids are drained in the vertical direction by an incremental increase in the Bond number. Black particles denote soil grains and impermeable boundaries of the flow domain, light gray particles represent gas phase, and dark gray particles represent liquid phase.

Image of FIG. 2.
FIG. 2.

Saturation versus Bond number as a function of the fracture orientation. Drainage of a strongly wetting liquid in response to the incremental increase in the Bond number.

Image of FIG. 3.
FIG. 3.

Saturation versus time as a function of the fracture orientation. Drainage of a strongly wetting liquid in response to an abrupt increase in the Bond number.

Image of FIG. 4.
FIG. 4.

Equilibrium distribution of the fluids with different wetting properties for : (a) strongly wetting liquid, saturation and (b) weakly wetting liquid. Liquids were drained by an abrupt increase in the Bond number.

Image of FIG. 5.
FIG. 5.

Saturation versus time as a function of the liquid wetting strength. Liquids were drained by the abrupt increase in the Bond number.

Image of FIG. 6.
FIG. 6.

Equilibrium distribution of a strongly wetting liquid for three different Bond numbers during drainage of the liquid from anisotropic porous media for three different Bond numbers: (a) major axes of soil grains are aligned in the vertical direction and (b) major axes of soil grains are aligned in the horizontal direction. Liquids are drained in the vertical direction by an incremental increase in the Bond number. Black particles denote soil grains and impermeable boundaries of the flow domain, light gray particles represent gas phase, and dark gray particles represent liquid phase.

Image of FIG. 7.
FIG. 7.

Effect of orientation of the anisotropic porous medium on the relationship for the strongly wetting liquid drained by incremental increase in the Bond number. (1) Solid line: vertical particle alignment, relationship is estimated for the whole domain; (2) dashed line: horizontal particle alignment, relationship is estimated for the whole domain; (3) triangle symbols: vertical particle alignment, relationship is estimated for the domain bounded by the dashed line (Fig. 6); (4) “X” symbols: horizontal particle alignment, relationship is estimated for the domain bounded by the dashed line (Fig. 6).

Image of FIG. 8.
FIG. 8.

Drainage of a strongly wetting liquid after an instantaneous increase of the Bond number from 0 to 1.04 in similar anisotropic porous domains with vertical and horizontal particle alignments. The depicted stages of desaturation have saturations corresponding to the equilibrium saturations during drainage under incrementally increasing body forces, as shown in Fig. 7.

Image of FIG. 9.
FIG. 9.

Saturation of a strongly wetting liquid as a function of time for similar anisotropic porous media with different grain orientations. Liquid is drained by instantaneous increase in the Bond number.

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/content/aip/journal/pof2/19/10/10.1063/1.2772529
2007-10-01
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Pore-scale simulations of drainage of heterogeneous and anisotropic porous media
http://aip.metastore.ingenta.com/content/aip/journal/pof2/19/10/10.1063/1.2772529
10.1063/1.2772529
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