Axisymmetric particle rotations in shear flow
ORAL
Abstract
We experimentally investigate the rotational dynamics of a neutrally-buoyant axisymmetric particle in a viscous shearing flow.
A custom-built shearing cell and a multi-view shape reconstruction method are used to obtain direct measurement of the period and the angular phase of the Jeffery orbits (Jeffery, 1922).
We report good agreement with the data available in the literature (Trevelyan and Mason, 1951; Goldsmith and Mason, 1962) and we complement these data by measuring the period and the angular phase over an extended range of particle aspect ratios. In particular, we consider aspect ratios smaller than those previously reported, which exhibit rotation periods larger than expected by Trevelyan and Mason.
A custom-built shearing cell and a multi-view shape reconstruction method are used to obtain direct measurement of the period and the angular phase of the Jeffery orbits (Jeffery, 1922).
We report good agreement with the data available in the literature (Trevelyan and Mason, 1951; Goldsmith and Mason, 1962) and we complement these data by measuring the period and the angular phase over an extended range of particle aspect ratios. In particular, we consider aspect ratios smaller than those previously reported, which exhibit rotation periods larger than expected by Trevelyan and Mason.
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Presenters
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Davide Di Giusto
Polytechnic Department, University of Udine, Udine, Italy; Aix-Marseille Université, CNRS, IUSTI, Marseille, France
Authors
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Davide Di Giusto
Polytechnic Department, University of Udine, Udine, Italy; Aix-Marseille Université, CNRS, IUSTI, Marseille, France
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Laurence Bergougnoux
Aix-Marseille Université, CNRS, IUSTI, Marseille, France
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Cristian Marchioli
Polytechnic Department, University of Udine, Udine, Italy, Univ of Udine
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Elisabeth L Guazzelli
CNRS, Université de Paris, CNRS, Matièere et Systèmes Complexes, Paris, France