Elongated swimmers in laminar and turbulent flows
ORAL
Abstract
We consider the motion of spheroidal, axisymmetric microorganisms swimming in
laminar and turbulent flows.
By means of direct numerical simulations, supported by analytical calculation
in a simplified stochastic setting, we find that in general elongated swimmers
are able to align with the local velocity.
The preferential swimming direction also produces an accumulation of
microorganisms with an intensity which depends on the parameters of the flow.
We discuss the relevance of our results for applications and aquatic ecology.
laminar and turbulent flows.
By means of direct numerical simulations, supported by analytical calculation
in a simplified stochastic setting, we find that in general elongated swimmers
are able to align with the local velocity.
The preferential swimming direction also produces an accumulation of
microorganisms with an intensity which depends on the parameters of the flow.
We discuss the relevance of our results for applications and aquatic ecology.
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Publication: M. Borgnino, G. Boffetta, M. Cencini, F. De Lillo and K. Gustavsson "Alignment of elongated swimmers in a laminar and turbulent Kolmogorov flow", Phys. Rev. Fluids 7, 074603 (2022)
Presenters
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Guido Boffetta
University of Torino
Authors
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Guido Boffetta
University of Torino
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Massimo Cencini
ISC-CNR, CNR-ISC & INFN Tor Vergata
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Matteo Borgnino
University of Milano Bicocca, Department of Earth and Environmental Sciences, University of Milan-Bicocca, Milan, Italy
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Filippo De Lillo
Università di Torino
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Kristian Gustavsson
University of Gothenburg