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Taylor-Couette instability in disk suspensions: Experimental observation and theory

Gillissen, JJJ; Cagney, N; Lacassagne, T; Papadopoulou, A; Balabani, S; Wilson, HJ; (2020) Taylor-Couette instability in disk suspensions: Experimental observation and theory. Physical Review Fluids , 5 (8) , Article 083302. 10.1103/PhysRevFluids.5.083302. Green open access

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Abstract

Using the well-known hydrodynamic theory for dilute suspensions of spheroids, we have previously predicted the destabilization of Taylor-Couette flow due to anisotropic viscous stresses induced by suspended disk-shaped particles [Gillissen and Wilson, Phys. Rev. Fluids 3, 113903 (2018)]. Here we provide experimental evidence for the destabilization mechanism using suspensions of mica flakes. There is good qualitative agreement between the experiment and theory in the mica concentration dependence of the critical speed for instability onset and of the axial wavelength of the corresponding Taylor vortices. Quantitative differences are attributed to hydrodynamic interactions between the disks, which we account for in the theory in an ad hoc fashion using rotary diffusion.

Type: Article
Title: Taylor-Couette instability in disk suspensions: Experimental observation and theory
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevFluids.5.083302
Publisher version: https://doi.org/10.1103/PhysRevFluids.5.083302
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Mathematics
URI: https://discovery.ucl.ac.uk/id/eprint/10108242
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