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...

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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
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creator Lüsebrink, Daniel
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description 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.
doi_str_mv 10.1063/1.4971860
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subjects Computational fluid dynamics
Ferromagnetism
Fluid flow
Laminar flow
Magnetic fields
Shear flow
Tumbling
Tumbling motion
title The behavior of a magnetic filament in flow under the influence of an external magnetic field
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