Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió acceptadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/149758
Direct measurement of Lighthill's energetic efficiency of a minimal magnetic microswimmer
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
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.
Matèries
Matèries (anglès)
Citació
Citació
CALERO BORRALLO, Carles, GARCÍA-TORRES, J., ORTIZ-AMBRIZ, Antonio, SAGUÉS I MESTRE, Francesc, PAGONABARRAGA MORA, Ignacio, TIERNO, Pietro. Direct measurement of Lighthill's energetic efficiency of a minimal magnetic microswimmer. _Nanoscale_. 2019. Vol. 11, núm. 40, pàgs. 18723-18729. [consulta: 28 de gener de 2026]. ISSN: 2040-3364. [Disponible a: https://hdl.handle.net/2445/149758]