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Rolling ferrofluid drop on the surface of a liquid

Title data

Sterr, Verena ; Krauß, Robert ; Morozov, K. I. ; Rehberg, Ingo ; Engel, Andreas ; Richter, Reinhard:
Rolling ferrofluid drop on the surface of a liquid.
In: New Journal of Physics. Vol. 10 (June 2008) . - no. 063029.
ISSN 1367-2630
DOI: https://doi.org/10.1088/1367-2630/10/6/063029

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Abstract in another language

We report on the controlled transport of drops of magnetic liquid, which are floating on top of a non-magnetic liquid layer. A magnetic field which is rotating in a vertical plane creates a torque on the drop. Due to surface stresses within the immiscible liquid beneath, the drop is propelled forward. We measure the drop speed for different field amplitudes, field frequencies and drop volumes. Simplifying theoretical models describe the drop either as a solid sphere with a Navier slip boundary condition, or as a liquid half-sphere. An analytical expression for the drop speed is obtained which is free of any fitting parameters and is well in accordance with the experimental measurements. Possible microfluidic applications of the rolling drop are also discussed.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Nonlinear dynamics; Ferrofluids; Drop dynamics
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V > Chair Experimental Physics V - Univ.-Prof. Dr. Ingo Rehberg
Profile Fields > Advanced Fields > Nonlinear Dynamics
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 26 Sep 2018 10:03
Last Modified: 20 Feb 2019 10:35
URI: https://eref.uni-bayreuth.de/id/eprint/42948