Fabrication of Ferrofluidic Micropump

Ashouri, Majid | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40706 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Shafii, Mohammad Behshad; Saidi, Mohammad Said; Saidi, Mohammad Hassan
  7. Abstract:
  8. In this project, two Ferrofluidic micropumps that do not need any mechanical moving parts are presented. These micropumps are including simple microchannels containing magnetic fluid plugs that are used as flow actuator and the on/off valve. Using external magnetic field actuation in this type of micropumps, the magnetic fluid would have continuous motion in a channel with micrometer dimensions that would provide the main fluid to be pumped. Although the plug of magnetic fluid has surface contact with operative fluid, but considering its specific features, it would not compine with the pumping fluid. These micropumps may be used to pump the fluids or gases. The outcomes of the investigation are construction, assemble and discussing the experimental study on rotary and piston ferrofluidic micropumps. In order to actuate the plug of magnetic fluid in rotary and piston micropumps, one and two magnetic actuators are required, respectively. Also the magnetic fluid in both micropumps acts as both actuating the flow and on/off valve at the entrance and exit of micropump. The magnetic Fluid actuators are the permanent magnets that their movements are supplied by stepper motors.

  9. Keywords:
  10. Micropumps ; Microchannel ; Magnetic Fields ; Ferrofluid ; Microvalve

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