Moderate reynolds number flow through microchannels filled with arrays of micro-cylinders

A. Tamayol, J. Yeom, K. Hooman, M. Akbari

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Moderate Reynolds number flow pressure drop of ordered arrays of cylinders embedded inside microchannels is studied experimentally and analytically. The array of microcylinders is modeled as a porous medium embedded inside the channel. The pressure drop is expressed as a function of the involved geometrical parameters such as micro-cylinder diameter, spacing between adjacent cylinders, channel height, and its width. To verify the developed models, 15 silicon/glass samples are fabricated using the Deep Reactive Ion Etching (DRIE) technique. Pressure drop measurements are performed over a wide range of nitrogen flow rates spanning from 0.1 sccm to 50 sccm (velocity range of 0.004 m/s to 2 m/s). The experimental data shows a parabolic relationship between the pressure drop and the volumetric flow rate in moderate Reynolds number flow. In addition, the proposed model captures the experimental data.

Original languageEnglish (US)
Pages (from-to)83-88
Number of pages6
JournalAIP Conference Proceedings
Issue number1
StatePublished - 2011
Externally publishedYes


  • Analytical modeling
  • Channels filled with micro-cylinders
  • Experiment
  • Microfluidics
  • Moderate Reynolds number flow
  • Pressure drop

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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