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Seminar✓ Recording AvailablePhysics of Life

The impact of elongation on transport in shear flow

Rachel Bearon

Prof

University of Liverpool

Schedule
Wednesday, November 11, 2020

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Schedule

Wednesday, November 11, 2020

3:00 PM Europe/London

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Host: BioActive Fluids

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Recording provided by the organiser.

Event Information

Domain

Physics of Life

Host

BioActive Fluids

Duration

70 minutes

Abstract

I shall present two recent piece of work investigating how shape effects the transport of active particles in shear. Firstly we will consider the sedimentation of particles in 2D laminar flow fields of increasing complexity; and how insights from this can help explain why turbulence can enhance the sedimentation of negatively buoyant diatoms [1]. Secondly, we will consider the 3D transport of elongated active particles under the action of an aligning force (e.g. gyrotactic swimmers) in some simple flow fields; and will see how shape can influence the vertical distribution, for example changing the structure of thin layers [2]. [1] Enhanced sedimentation of elongated plankton in simple flows (2018). IMA Journal of Applied Mathematics W Clifton, RN Bearon, & MA Bees. [2] Elongation enhances migration through hydrodynamic shear (in Prep), RN Bearon & WM Durham.

Topics

diatomselongated active particlesfluidsgyrotactic swimmershydrodynamic shearlaminar flowparticle shapesedimentationshear flowvertical distribution

About the Speaker

Rachel Bearon

Prof

University of Liverpool

Contact & Resources

Personal Website

www.liverpool.ac.uk/mathematical-sciences/staff/rachel-bearon/

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