Chain-induced effects in the Faraday instability on ferrofluids in a horizontal magnetic field

Details Chain-induced effects in the Faraday instability on ferrofluids in a horizontal magnetic field Chain-induced effects in the Faraday instability on ferrofluids in a horizontal magnetic field

2004-01-15

arxiv.org/abs/physics/0401073v1

Phys. Fluids, vol. 16(4), 925 (2004).

Physics

Fluid Dynamics

12 pages, 11 figures

Scientific paper

10.1063/1.1649757

The linear stability analysis of the Faraday instability on a viscous ferrofluid in a horizontal magnetic field is performed. Strong dipole-dipole interactions lead to the formation of chains elongated in the field direction. The formation of chains results in a qualitative new behaviour of the ferrofluid. This new behaviour is characterized by a neutral stability curve similar to that observed earlier for Maxwell viscoelastic liquids and causes a significant weakening of the energy dissipation at high frequencies. In the case of a ferrofluid with chains in a horizontal magnetic field, the effective viscosity is anisotropic and depends on the field strength as well as on the wave frequency.

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