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Magnetically-driven biomimetic micro pumping using vortices
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DOI：10.1039/b407710e.png)
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摘要
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Planar micropumps utilizing vortices shed by an oscillating ferromagnetic bar are presented. The movement of the bar is induced by magnetic coupling with an external spinning magnet. Thus, energy transfer is achieved without physical contact or need of any on-chip power source. To create vortices inside the chip, the Reynolds number is locally increased with the oscillation of the bar. The utilization of the vortices as a tool for efficient transfer of energy is inspired by the behaviour of swimming animals and flying insects in nature. The pumps operate in two different scales (milli-scale and micro-scale) in order to take advantage of both. Experiments are presented characterizing the pumps and their flow patterns. The range of operation of the pumps is from 3 mul min(-1) to 600 mul min(-1), though smaller flow rates are also possible.
Keyword:
MICROFLUIDIC SYSTEMS
FLOW
HYDRODYNAMICS
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