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.
*We thank the support by the INFN FieldTurb initiative and the Vetenskapsra°det, Grant No. 2018-03974
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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