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- W4385969779 abstract "We study the imbibition of a wetting liquid between flexible sheets that are fixed at both ends. Assuming a narrow gap between the sheets, we solve the lubrication equation coupled with a slender body deformation. When the sheets are parallel, we find that the deformation initially speeds up the flow, as shown in previous studies, but only up to the middle of the channel. As the channel contracts, the hydrodynamic resistance increases and ultimately slows down the filling process. Below a threshold stiffness, the channel collapses and imbibition stops. We propose a scaling of the filling duration near this threshold. Next, we show that if the sheets are initially tilted with a minimal angle, the channel avoids collapse. The liquid front pulls the diverging sheets and spreads in a nearly parallel portion, which maintains the capillary propulsion and enhances the wicking. Therefore, while it is established that diverging rigid plates imbibe liquids slower than parallel ones do, we show that elasticity reverses this principle: diverging flexible sheets imbibe liquids faster than parallel ones. We find an optimal tilt angle that gives the shortest filling time." @default.
- W4385969779 created "2023-08-19" @default.
- W4385969779 creator A5010007962 @default.
- W4385969779 creator A5070254104 @default.
- W4385969779 date "2023-08-18" @default.
- W4385969779 modified "2023-10-06" @default.
- W4385969779 title "Capillary Imbibition in a Diverging Flexible Channel" @default.
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- W4385969779 doi "https://doi.org/10.1021/acs.langmuir.3c01488" @default.
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- W4385969779 hasPublicationYear "2023" @default.
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