Title:
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Direct measurement of Lighthill’s energetic efficiency of a minimal magnetic microswimmer
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Author:
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Calero, Carles; García Torres, José Manuel; Ortiz Ambriz, Antonio; Sagués Mestres, Francesc; Pagonabarraga, I.; Tierno, Prieto
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica |
Abstract:
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The realization of artificial microscopic swimmers able to
propel in viscous fluids is an emergent research field of fundamental
interest and vast technological applications. For
certain functionalities, the efficiency of the microswimmer
in converting the input power provided through an external
actuation into propulsive power output can be critical. Here
we use a microswimmer composed by a self-assembled
ferromagnetic rod and a paramagnetic sphere and directly
determine its swimming efficiency when it is actuated by
a swinging magnetic field. Using fast video recording and
numerical simulations we fully characterize the dynamics
of the propeller and identify the two independent degrees
of freedom which allow its propulsion. We then obtain
experimentally the Lighthill’s energetic efficiency of the
swimmer by measuring the power consumed during propulsion
and the energy required to translate the propeller at
the same speed. Finally, we discuss how the efficiency of
our microswimmer could be increased upon suitable tuning
of the different experimental parameters. |
Subject(s):
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-Àrees temàtiques de la UPC::Física -Hydrodynamics -Propellers -Nanofluids -Nanoelectromechanical systems -Magnetism -Bioengineering -Hidrodinàmica -Hèlices -Nanofluids -Sistemes nanoelectromecànics -Magnetisme -Bioenginyeria |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Submitted version Article |
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