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Article Dans Une Revue Physics of Fluids Année : 2014

Elastocapillary flows in flexible tubes

Résumé

Interactions between capillary and elastic effects are relevant to a variety of applications from micro- and nano-scale manufacturing to biological systems. In this work, we investigate capillary flows in flexible, millimeter-scale cylindrical elastic tubes. We demonstrate that surface tension can cause sufficiently flexible tubes to collapse and coalesce spontaneously through non-axisymmetric buckling, and develop criteria for the initial deformation and complete collapse of a circular tube. Experimental results for capillary rise and evaporation of a liquid in a flexible tube are presented, and several regimes are seen for the equilibrium state of a flexible tube deforming under capillary pressure. Deformations of the tube walls are measured in different regimes and compared with a shell theory model. Analysis and experimental results show that despite the complex and non-axisymmetric deformed shapes of cylindrical structures, the elastocapillary length used in previous literature for flat plates and sheets can be used to predict the behavior of flexible tubes
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Dates et versions

hal-01441769 , version 1 (20-01-2017)

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Theresa B. Hoberg, Emilie Verneuil, A. E. Hosoi. Elastocapillary flows in flexible tubes. Physics of Fluids, 2014, 26 (12), pp.122103. ⟨10.1063/1.4902509⟩. ⟨hal-01441769⟩
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