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The behavior of a magnetic filament in flow under the influence of an external magnetic field

Autor(en)
Daniel Lüsebrink, Joan J. Cerdà, Pedro A. Sánchez, Sofia Kantorovich, Tomás Sintes
Abstrakt

We present an extensive numerical study of the behaviour of a filament made of ferromagnetic colloidal particles subjected to the simultaneous action of a fluid flow and a stationary external magnetic field perpendicular to the flow lines. We found that in the presence of a shear flow, the tumbling motion observed at zero field is strongly inhibited when the external magnetic field is applied. The field is able to stabilise the filament with a well defined degree of alignment that depends on the balance between hydrodynamic and magnetic torques. In addition, for a Poiseuille flow, it has been found that the initial position has a long lasting influence on the behaviour of the magnetic filament when the external field is applied.

Organisation(en)
Computergestützte Physik und Physik der Weichen Materie
Externe Organisation(en)
University of the Balearic Islands, University of British Columbia (UBC)
Journal
Journal of Chemical Physics
Band
145
Anzahl der Seiten
12
ISSN
0021-9606
DOI
https://doi.org/10.1063/1.4971860
Publikationsdatum
2016
Peer-reviewed
Ja
ÖFOS 2012
103015 Kondensierte Materie, 103032 Strömungslehre, 103006 Chemische Physik
Schlagwörter
ASJC Scopus Sachgebiete
Allgemeine Physik und Astronomie, Physical and Theoretical Chemistry
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/f5bdec5e-d19f-4360-8459-74f265648361