Resonant alignment of microswimmer trajectories in oscillatory shear flows

Alexander Hope; Ottavio A. Croze; Wilson Poon; Martin Alan Bees; Mark Haw

doi:10.1103/PhysRevFluids.1.051201

Resonant alignment of microswimmer trajectories in oscillatory shear flows

Alexander Hope, Ottavio A. Croze, Wilson Poon, Martin Alan Bees, Mark Haw

Mathematics

Research output: Contribution to journal › Article › peer-review

Abstract

Oscillatory flows are commonly experienced by swimming microorganisms in the environment, industrial applications and rheological investigations. We experimentally characterise the response of the alga Dunaliella salina to oscillatory shear flows, and report the surprising discovery that algal swimming trajectories orient perpendicular to the flow-shear plane. The ordering has the characteristics of a resonance in the driving parameter space. The behaviour is qualitatively reproduced by a simple model and simulations accounting for helical swimming, suggesting a mechanism for ordering and criteria for the resonant amplitude and frequency. The implications of this work for active oscillatory rheology and industrial algal processing are discussed.

Original language	English
Article number	051201
Pages (from-to)	1-8
Number of pages	8
Journal	Physical Review Fluids
Volume	1
DOIs	https://doi.org/10.1103/PhysRevFluids.1.051201
Publication status	Published - 20 Sept 2016

Bibliographical note

©2016 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

Access to Document

10.1103/PhysRevFluids.1.051201

HopeCrozeetalOscShear_resubPRF20160803
©2016 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.
Accepted author manuscript, 632 KB

Martin Alan Bees
- martin.beesyork.acuk
- Mathematics - Head Of Department
Person: Academic

Cite this

@article{51353e0010b147d39db2bdb508ad64e1,

title = "Resonant alignment of microswimmer trajectories in oscillatory shear flows",

abstract = "Oscillatory flows are commonly experienced by swimming microorganisms in the environment, industrial applications and rheological investigations. We experimentally characterise the response of the alga Dunaliella salina to oscillatory shear flows, and report the surprising discovery that algal swimming trajectories orient perpendicular to the flow-shear plane. The ordering has the characteristics of a resonance in the driving parameter space. The behaviour is qualitatively reproduced by a simple model and simulations accounting for helical swimming, suggesting a mechanism for ordering and criteria for the resonant amplitude and frequency. The implications of this work for active oscillatory rheology and industrial algal processing are discussed.",

author = "Alexander Hope and Croze, {Ottavio A.} and Wilson Poon and Bees, {Martin Alan} and Mark Haw",

note = "{\textcopyright}2016 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher{\textquoteright}s self-archiving policy. Further copying may not be permitted; contact the publisher for details.",

year = "2016",

month = sep,

day = "20",

doi = "10.1103/PhysRevFluids.1.051201",

language = "English",

volume = "1",

pages = "1--8",

journal = "Physical Review Fluids",

issn = "2469-990X",

publisher = "American Physical Society",

}

TY - JOUR

T1 - Resonant alignment of microswimmer trajectories in oscillatory shear flows

AU - Hope, Alexander

AU - Croze, Ottavio A.

AU - Poon, Wilson

AU - Bees, Martin Alan

AU - Haw, Mark

N1 - ©2016 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

PY - 2016/9/20

Y1 - 2016/9/20

N2 - Oscillatory flows are commonly experienced by swimming microorganisms in the environment, industrial applications and rheological investigations. We experimentally characterise the response of the alga Dunaliella salina to oscillatory shear flows, and report the surprising discovery that algal swimming trajectories orient perpendicular to the flow-shear plane. The ordering has the characteristics of a resonance in the driving parameter space. The behaviour is qualitatively reproduced by a simple model and simulations accounting for helical swimming, suggesting a mechanism for ordering and criteria for the resonant amplitude and frequency. The implications of this work for active oscillatory rheology and industrial algal processing are discussed.

AB - Oscillatory flows are commonly experienced by swimming microorganisms in the environment, industrial applications and rheological investigations. We experimentally characterise the response of the alga Dunaliella salina to oscillatory shear flows, and report the surprising discovery that algal swimming trajectories orient perpendicular to the flow-shear plane. The ordering has the characteristics of a resonance in the driving parameter space. The behaviour is qualitatively reproduced by a simple model and simulations accounting for helical swimming, suggesting a mechanism for ordering and criteria for the resonant amplitude and frequency. The implications of this work for active oscillatory rheology and industrial algal processing are discussed.

U2 - 10.1103/PhysRevFluids.1.051201

DO - 10.1103/PhysRevFluids.1.051201

M3 - Article

SN - 2469-990X

VL - 1

SP - 1

EP - 8

JO - Physical Review Fluids

JF - Physical Review Fluids

M1 - 051201

ER -

Resonant alignment of microswimmer trajectories in oscillatory shear flows

Abstract

Bibliographical note

Access to Document

Profiles

Martin Alan Bees

Cite this