Magnetic traveling-stripe-forcing: enhanced transport in the advent of the Rosensweig instability

Details Magnetic traveling-stripe-forcing: enhanced transport in the advent of the Rosensweig instability Magnetic traveling-stripe-forcing: enhanced transport in the advent of the Rosensweig instability

2010-04-23

arxiv.org/abs/1004.4151v1

Physics

Fluid Dynamics

6 Pages, 8 Figures

Scientific paper

A new kind of contactless pumping mechanism is realized in a layer of ferrofluid via a spatio-temporally modulated magnetic field. The resulting pressure gradient leads to a liquid ramp, which is measured by means of X-rays. The transport mechanism works best if a resonance of the surface waves with the driving is achieved. The behavior can be understood semi-quantitatively by considering the magnetically influenced dispersion relation of the fluid.

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