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.

*This work was supported by the University of Udine and the Université Franco-Italienne, scholarship Vinci 2021.

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Presenters

  • Davide Di Giusto

    • Polytechnic Department, University of Udine, Udine, Italy; Aix-Marseille Université, CNRS, IUSTI, Marseille, France

Authors

  • Davide Di Giusto

    • Polytechnic Department, University of Udine, Udine, Italy; Aix-Marseille Université, CNRS, IUSTI, Marseille, France

  • Laurence Bergougnoux

    • Aix-Marseille Université, CNRS, IUSTI, Marseille, France

  • Cristian Marchioli

    • Polytechnic Department, University of Udine, Udine, Italy
    • Univ of Udine

  • Elisabeth L Guazzelli

    • CNRS
    • Université de Paris, CNRS, Matièere et Systèmes Complexes, Paris, France