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Spontaneous penetration of a non-wetting drop into an exposed pore
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10.1063/1.4804957
/content/aip/journal/pof2/25/5/10.1063/1.4804957
http://aip.metastore.ingenta.com/content/aip/journal/pof2/25/5/10.1063/1.4804957
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic of computational domain.

Image of FIG. 2.
FIG. 2.

Schematic of a static contact line.

Image of FIG. 3.
FIG. 3.

Possible equilibrium configurations when a drop enters a pore. (a) spherical drop; (b) zero penetration with surface spreading; (c) partial penetration with surface spreading; (d) partial penetration with no surface spreading; (e) complete penetration. is the pore radius, is the initial drop radius, and is the penetration depth. Equilibration requires = . π/2 < θ ⩽ θ in (b) and π/2 < θ ⩽ θ in (d).

Image of FIG. 4.
FIG. 4.

Penetration regimes.

Image of FIG. 5.
FIG. 5.

Drop penetration with θ ∈ (π/2, 3π/4) and ∈ ( , ). θ = 2π/3, = 1.1.

Image of FIG. 6.
FIG. 6.

(a)–(c) ϕ contours near the contact line. θ = 2π/3, = 1.1. The solid line indicates θ and the dashed line indicates the apparent contact angle θ.

Image of FIG. 7.
FIG. 7.

(a)–(c) Drop penetration with θ ∈ (π/2, 3π/4) and ∈ ( , ). θ = 2π/3, = 1.5. Arrows indicate the moving direction of the contact lines.

Image of FIG. 8.
FIG. 8.

(a)–(c) Pressure contours and streamlines. θ = 2π/3, = 1.5.

Image of FIG. 9.
FIG. 9.

Drop penetration with θ ∈ (π/2, 3π/4) and ∈ ( , ). θ = 2π/3, = 1.95. The inset shows a close view at the corner.

Image of FIG. 10.
FIG. 10.

Contours of velocity magnitude and streamlines. θ = 2π/3, = 1.95.

Image of FIG. 11.
FIG. 11.

(a, b) Drop penetration with θ ∈ (π/2, 3π/4) and = . θ = 2π/3.

Image of FIG. 12.
FIG. 12.

Unbalanced Young's force at = 0 for = .

Image of FIG. 13.
FIG. 13.

Drop penetration with θ ∈ (π/2, 3π/4) and > . θ = 2π/3, = 2.5.

Image of FIG. 14.
FIG. 14.

Drop penetration with θ ∈ (3π/4, π) and ∈ ( , ). θ = 5π/6, = 1.1 .

Image of FIG. 15.
FIG. 15.

(a) Drop penetration with θ ∈ (3π/4, π) and ∈ ( , ). θ = 5π/6, = 1.5 . (b) The magnified view of ϕ = ±0.9 contours at the corner.

Image of FIG. 16.
FIG. 16.

Drop penetration with θ ∈ (3π/4, π) and > . θ = 5π/6, = 2.5.

Image of FIG. 17.
FIG. 17.

Surface energy as a function of penetration depth. (a) θ = 2π/3; (b) θ = 3π/4; (c) θ = 5π/6; (d) = 2.5 .

Image of FIG. 18.
FIG. 18.

(a, b) Transient of drop penetration.

Image of FIG. 19.
FIG. 19.

Viscous dissipation for θ = 2π/3 and = 1.5 . (a) The dissipation rate per unit volume in the phase-field simulations. The left and right halves are from two different time instants. (b) The viscous dissipation rate versus time.

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/content/aip/journal/pof2/25/5/10.1063/1.4804957
2013-05-21
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spontaneous penetration of a non-wetting drop into an exposed pore
http://aip.metastore.ingenta.com/content/aip/journal/pof2/25/5/10.1063/1.4804957
10.1063/1.4804957
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