Inertial migration of oblate spheroids in a plane channel

Nizkaya TV, Gekova AS, Harting J, Asmolov ES, Vinogradova OI (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Physics of Fluids American Institute of Physics (AIP)

Book Volume: 32

Article Number: 0028353

Journal Issue: 11

DOI: 10.1063/5.0028353

Abstract

We discuss an inertial migration of oblate spheroids in a plane channel, where the steady laminar flow is generated by a pressure gradient. Our lattice Boltzmann simulations show that spheroids orient in the flow, so that their minor axis coincides with the vorticity direction (a log-rolling motion). Interestingly, for spheroids of moderate aspect ratios, the equilibrium positions relative to the channel walls depend only on their equatorial radius a. By analyzing the inertial lift force, we argue that this force is proportional to a3b, where b is the polar radius, and conclude that the dimensionless lift coefficient of the oblate spheroid does not depend on b and is equal to that of the sphere of radius a.

Authors with CRIS profile

Jens Harting Professur für Multiskalen-Modellierung für kontrollierte Filmbildung (HIERN)

Involved external institutions

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry (RAS) / Институт физической химиии и электрохимии им. А.Н. Фрумкина RU Russian Federation (RU)

How to cite

APA:

Nizkaya, T.V., Gekova, A.S., Harting, J., Asmolov, E.S., & Vinogradova, O.I. (2020). Inertial migration of oblate spheroids in a plane channel. Physics of Fluids, 32(11). https://dx.doi.org/10.1063/5.0028353

MLA:

Nizkaya, Tatiana V., et al. "Inertial migration of oblate spheroids in a plane channel." Physics of Fluids 32.11 (2020).

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