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Rotation of a submerged finite cylinder moving down a soft incline

Author(s): Saintyves, B; Rallabandi, B; Jules, T; Ault, J; Salez, T; et al

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Abstract: A submerged finite cylinder moving under its own weight along a soft incline lifts off and slides at a steady velocity while also spinning. Here, we experimentally quantify the steady spinning of the cylinder and show theoretically that it is due to a combination of an elastohydrodynamic torque generated by flow in the variable gap, and the viscous friction on the edges of the finite-length cylinder. The relative influence of the latter depends on the aspect ratio of the cylinder, the angle of the incline, and the deformability of the substrate, which we express in terms of a single scaled compliance parameter. By independently varying these quantities, we show that our experimental results are consistent with a transition from an edge-effect dominated regime for short cylinders to a gap-dominated elastohydrodynamic regime when the cylinder is very long.
Publication Date: 2020
Citation: Saintyves, B, Rallabandi, B, Jules, T, Ault, J, Salez, T, Schönecker, C, Stone, HA, Mahadevan, L. (2020). Rotation of a submerged finite cylinder moving down a soft incline. Soft Matter, 16 (4000 - 4007. doi:10.1039/c9sm02344e
DOI: doi:10.1039/c9sm02344e
Pages: 4000 - 4007
Type of Material: Journal Article
Journal/Proceeding Title: Soft Matter
Version: Author's manuscript

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