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

Author(s)
Daniel Lüsebrink, Joan J. Cerdà, Pedro A. Sánchez, Sofia Kantorovich, Tomás Sintes
Abstract

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(s)
Computational and Soft Matter Physics
External organisation(s)
University of the Balearic Islands, University of British Columbia (UBC)
Journal
Journal of Chemical Physics
Volume
145
No. of pages
12
ISSN
0021-9606
DOI
https://doi.org/10.1063/1.4971860
Publication date
2016
Peer reviewed
Yes
Austrian Fields of Science 2012
103015 Condensed matter, 103032 Fluid mechanics, 103006 Chemical physics
Keywords
ASJC Scopus subject areas
General Physics and Astronomy, Physical and Theoretical Chemistry
Portal url
https://ucrisportal.univie.ac.at/en/publications/f5bdec5e-d19f-4360-8459-74f265648361