Rotation of a submerged finite cylinder moving down a soft incline

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 as well as the deformability of the substrate, which we express in term of a single scaled compliance parameter. By varying this compliance parameter, 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.
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Submitted on : Thursday, December 5, 2019 - 5:27:53 PM
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  • HAL Id : hal-02385614, version 1
  • ARXIV : 1912.03038

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Baudouin Saintyves, Bhargav Rallabandi, Theo Jules, Jesse Ault, Thomas Salez, et al.. Rotation of a submerged finite cylinder moving down a soft incline. 2019. ⟨hal-02385614⟩

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