Work

Orientation of flat bodies of revolution in shear flows at low Reynolds number

Year: 2025

Type: article

Abstract: We experimentally investigate the rotational dynamics of neutrally buoyant flat bodies of revolution (spheroids, disks and rings with different cross-sectional shapes) in shear flows. In the Stokes regime, the axis of revolution of these rigid particles moves in one of a family of closed periodic Jeffery orbits. Inertia is able to lift the orbit degeneracy and induces drift among several rotations towards limiting stable orbits. Furthermore, permanent alignment can be achieved for disks and rings with triangular cross-sectional shapes, provided the inertia is sufficiently high. The bifurcations between the different dynamics are compared with those predicted by small-inertia asymptotic theories and numerical simulations.

Source: Journal of Fluid Mechanics

DOI: 10.1017/jfm.2025.10421

Authors: Davide Di Giusto, Laurence Bergougnoux, Elisabeth Guazzelli

Institutions: University of Udine, Institut Universitaire des Systèmes Thermiques Industriels, Laboratoire Matière et Systèmes Complexes

Language: English

Topic: Particle Dynamics in Fluid Flows

Subfield: Ocean Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,550

Funder: Agence Nationale de la Recherche