Magnetically-driven biomimetic micro pumping using vortices

Lab Chip. 2004 Dec;4(6):598-602. doi: 10.1039/b407710e. Epub 2004 Nov 11.

Abstract

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 microl min(-1) to 600 microl min(-1), though smaller flow rates are also possible.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biomimetics / instrumentation*
  • Biomimetics / methods
  • Equipment Design
  • Equipment Failure Analysis
  • Magnetics / instrumentation*
  • Microfluidic Analytical Techniques / instrumentation*
  • Microfluidic Analytical Techniques / methods
  • Microfluidics / instrumentation*
  • Microfluidics / methods