Effect of rotor shape on the transient performance of viscous micropump - Numerical study

P. Phutthavong, I. Hassan

Research output: Contribution to journalConference article

Abstract

Industrial applications today are demanding the implementation of microelectromechanical systems (MEMS) into their products. These are mechanical devices that are able to perform work, and yet have characteristic lengths less than 1 mm. As a result, Reynolds number is typically low, which indicates the dominance of viscous forces. When a cylinder placed eccentrically inside a microchannel, where the rotor axis is perpendicular to the channel axis, a net force is transferred to the fluid due to the unequal shear stresses on the upper and lower surfaces of the rotor. Consequently, this causes the surrounding fluid in the channel to displace towards the microchannel outlet. The present numerical investigation is a comparative study of transient flow behavior in a microchannel with rotating cylinders with different cross-sectional geometries. The effects of channel height, eccentricity, Reynolds number, and pump load were studied, as well as the development of their respective streamlines and pressure contours. The steady-state results were compared with existing numerical and experimental results, and the comparisons showed very good agreement.

Original languageEnglish
Pages (from-to)425-434
Number of pages10
JournalAdvances in Fluid Mechanics
Volume40
Publication statusPublished - 11 Oct 2004
EventFifth International Conference on Advances in Fluid Mechanics, AFM V - Lisbon, Portugal
Duration: 22 Mar 200424 Mar 2004

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Keywords

  • Rectangle cylinder flow
  • Square cylinder flow
  • Transient microfluidics

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Mechanical Engineering

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