Theoretical and experimental studies of a magnetically actuated valveless micropump

Ashouri, M ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1088/0960-1317/27/1/015016
  3. Publisher: Institute of Physics Publishing , 2017
  4. Abstract:
  5. This paper presents the prototype design, fabrication, and characterization of a magnetically actuated micropump. The pump body consists of three nozzle/diffuser elements and two pumping chambers connected to the ends of a flat-wall pumping cylinder. A cylindrical permanent magnet placed inside the pumping cylinder acts as a piston which reciprocates by using an external magnetic actuator driven by a motor. The magnetic piston is covered by a ferrofluid to provide self-sealing capability. A prototype composed of three bonded layers of polymethyl-methacrylate (PMMA) has been fabricated. Water has been successfully pumped at pressures of up to 750 Pa and flow rates of up to 700 μl min-1 while working at the piston actuation frequency of 4 and 5 Hz, respectively. 3D numerical simulations are also carried out to study the performance of the pump. The best experimental and numerical volumetric efficiency of the pump are about 7 and 8%, respectively, at the piston speed of 0.03 m s-1. The contactless external actuation feature of the design enables integration of the pump with other PMMA-based microfluidic systems with low cost and disposability. © 2016 IOP Publishing Ltd
  6. Keywords:
  7. Diffuser ; Ferrofluid ; Magnetic actuation ; PMMA channel ; Valveless micropump ; Cylinders (shapes) ; Diffusers (optical) ; Magnetic fluids ; Magnetism ; Permanent magnets ; Pistons ; Polymethyl methacrylates ; Pumps ; 3-D numerical simulation ; Magnetic actuation ; Micro fluidic system ; PMMA channel ; Prototype designs ; Pumping chambers ; Valveless micropumps ; Volumetric efficiency ; Magnetic actuators
  8. Source: Journal of Micromechanics and Microengineering ; Volume 27, Issue 1 , 2017 ; 09601317 (ISSN)
  9. URL: http://iopscience.iop.org/article/10.1088/0960-1317/27/1/015016