Fluid pumped by magnetic stress

Details Fluid pumped by magnetic stress Fluid pumped by magnetic stress

2004-05-06

arxiv.org/abs/physics/0405025v2

Applied Physics Letters 86, 024102 (2005)

Physics

Fluid Dynamics

3 pages, 4 figures

Scientific paper

10.1063/1.1846956

A magnetic field rotating on the free surface of a ferrofluid layer is shown to induce considerable fluid motion toward the direction the field is rolling. The measured flow velocity i) increases with the square of the magnetic field amplitude, ii) is proportional to the thickness of the fluid layer, and iii) has a maximum at a driving frequency of about 3 kHz. The pumping speed can be estimated with a two-dimensional flow model.

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