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

Lüsebrink, Daniel; Cerda, Joan J.; Sanchez, Pedro A.; Kantorovich, Sofia S.; Sintes, Tomas

doi:10.1063/1.4971860

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

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Lüsebrink, Daniel
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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http://aip.scitation.org/doi/abs/10.1063/1.4971860
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Citation

Lüsebrink, D., Cerda, J. J., Sanchez, P. A., Kantorovich, S. S., & Sintes, T. (2016). The behavior of a magnetic filament in flow under the influence of an external magnetic field. The Journal of Chemical Physics, 145(23): 234902. doi:10.1063/1.4971860.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-DE48-A

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. Published by AIP Publishing.