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Instabolotoes of a Ferrofludd Droplet in Alternatong and Rotatong Maghietic Fields

Published online by Cambridge University Press:  25 February 2011

J.-C. Bacrl ,
R. PerZynski ,
D. Salin  and
A. O. Čebers
J.-C. Bacrl
Affiliation:
Affiliation : Université Paris 7
R. PerZynski
Affiliation:
Laboratoire d'Acoustique et Optique de la Matière Condensée, Université Pierre et Marie Curie, Tour 13, bofte 78, 4 place Jussieu, 75252 Paris Cedex 05, France
D. Salin
Affiliation:
Laboratoire d'Acoustique et Optique de la Matière Condensée, Université Pierre et Marie Curie, Tour 13, bofte 78, 4 place Jussieu, 75252 Paris Cedex 05, France
A. O. Čebers
Affiliation:
Institute of Phycics, Latvian Academy of Sciences, 229021 Riga, Salaspils, Republic of Latvia
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Abstract

For the first time, response of magnetic fluid microdrops to time dependent magnetic fields are tested in two different experimental conditions (rotating field, crossed static and alternating fields). In both cases, a new shape instability is observed leading to cog-wheels either rotating either motionless. A simple model account for the stability range of oblate ellipsoidal shapes and for the lateral peak instability leading to the cogs which crown the cog-wheel.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 248: Symposium O – Complex Fluids , 1991 , 241
Copyright
Copyright © Materials Research Society 1992

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References

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