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

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...

Full description

Saved in:
Bibliographic Details
Published in:The Journal of chemical physics 2016-12, Vol.145 (23), p.234902-234902
Main Authors: Lüsebrink, Daniel, Cerdà, Joan J., Sánchez, Pedro A., Kantorovich, Sofia S., Sintes, Tomás
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Ferromagnetism
Fluid flow
Laminar flow
Magnetic fields
Shear flow
Tumbling
Tumbling motion
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.4971860