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The capillary trapping by a pair of horizontal cylinders

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If you have a question about this talk, please contact Dr C. P. Caulfield .

We study the trapping of a liquid between a pair of horizontal cylinders, as the first step towards the detailed understanding of the trapping properties of a porous medium. The shape of the trapped liquid has to satisfy the Laplace-Young equation. By means of an analytical solution to this nonlinear differential equation, we determine the shape of the trapped droplet and determine the physical parameters that maximize the trapped volume. Our results show that for small cylinders, the largest trapping occurs when the distance between the cylinders is equal to the capillary length. We also verify our analytical results using experiments and simpler asymptotic solutions.

This talk is part of the Fluid Mechanics (DAMTP) series.

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Hybrid: in-person in Cambridge & streaming online, via YouTube Mill Lane Lecture Rooms, Mill Lane Room GS15 at the William Gates Building and on Zoom: https://cl-cam-ac-uk.zoom.us/j/4361570789?pwd=Nkl2T3ZLaTZwRm05bzRTOUUxY3Q4QT09&from=addon

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