Liquid Rise Between Filaments in a V-Configuration

Miller, Bernard; Coe, Arthur B.; Ramachandran, Padmanabhan

doi:10.1177/004051756703701102

Cited by 18 publications

(7 citation statements)

References 7 publications

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“…A liquid deposited on two parallel rigid fibers can adopt different morphologies, either a compact hemispherical drop or a long liquid column of uniform cross-section. − We focus here on perfectly wetting liquids, i.e., with an equilibrium contact angle θ e = 0. Previously, we obtained a morphology diagram as a function of the drop volume V and the interfiber distance 2 d , renormalized by the fiber radius r (Figure a).…”

Section: Rigid Fibersmentioning

confidence: 99%

Evaporation of Drops on Two Parallel Fibers: Influence of the Liquid Morphology and Fiber Elasticity

et al. 2013

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We investigate experimentally the evaporation of liquid accumulated on a pair of parallel fibers, rigid or flexible. The liquid wetting the fibers can adopt two distinct morphologies: a compact drop shape, whose evaporation dynamics is similar to that of an isolated aerosol droplet, or a long liquid column of constant cross-section, whose evaporation dynamics depends upon the aspect ratio of the column. We thus find that the evaporation rate is constant for drops, while it increases strongly for columns as the interfiber distance decreases, and we propose a model to explain this behavior. When the fibers are flexible, the transition from drops to columns can be induced by the deformation of the fibers because of the capillary forces applied by the drop. Thus, we find that the evaporation rate increases with increasing flexibility. Furthermore, complex morphology transitions occur upon drying, which results in spreading of the drop as it evaporates.

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Section: Rigid Fibersmentioning

confidence: 99%

Evaporation of Drops on Two Parallel Fibers: Influence of the Liquid Morphology and Fiber Elasticity

et al. 2013

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“…Above a critical distance between the fibers, the liquid collects in a drop, which overspills the two fibers, as can be observed experimentally. [31,32] The experiments with a drop on two rigid parallel fibers have shown that the transition between the drop and column morphologies is hysteretic. More recently, the equilibrium morphologies of the liquid on crossed fibers have also been studied both analytically and experimentally.…”

Section: Introductionmentioning

confidence: 99%

Wetting morphologies on an array of fibers of different radii

et al. 2015

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We investigate the equilibrium morphology of a finite volume of liquid placed on two parallel rigid fibers of different radii. As observed for identical radii fibers, the liquid is either in a column morphology or adopts a drop shape depending on the inter-fiber distance. However the cross-sectional area and the critical inter-fiber distance at which the transition occurs are both modified by the polydispersity of the fibers. Using energy considerations, we analytically predict the critical inter-fiber distance corresponding to the transition between the column and the drop morphologies. This distance depends both on the radii of the fibers and on the contact angle of the liquid. We perform experiments using a perfectly wetting liquid on two parallel nylon fibers: the results are in good agreement with our analytical model. The morphology of the capillary bridges between fibers of different radii is relevant to the modeling of large arrays of polydisperse fibers.

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“…In this case, provided the distance between the bers is smaller than a critical value, a drop of wetting liquid will spontaneously wick in the inter-ber channel. 12 For example, Miller et al 13 observed that below a critical inter-ber distance, the drop spontaneously spreads and that the spreading can be reversed by separating the bers, and this spreading/pinning transition has been proposed to displace uids on a small scale. 14 In fact, the wicking leads to a novel equilibrium state where the liquid adopts the shape of a column of constant cross-section, as studied by Princen.…”

Section: Introductionmentioning

confidence: 99%