Magnetic traveling-stripe-forcing: enhanced transport in the advent of the Rosensweig instability
arXiv:1004.4151 · doi:10.1103/PhysRevE.82.036304
Abstract
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.
6 Pages, 8 Figures
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