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Stefan Bohlius, Helmut R. Brand, Harald Pleiner

Surface Waves and Rosensweig Instability in Isotropic Ferrogels

Keywords: Magnetic Gels, Surface Waves, Dispersion Relation, Rosensweig Instability

We derive the dispersion relation of surface waves for isotropic magnetic gels in the presence of an external magnetic field normal to the free surface. Above a critical field strength surface waves become linearly unstable with respect to a stationary pattern of surface protuberances. This linear stability criterion generalizes that of the Rosensweig instability for ferrofluids by taking into account elasticity, additionally.

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 220, 01/2006
Pages: 097 - 104

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