Effects of compressibility and transition to turbulence on flow through microchannels

K. Vijayalakshmi, K. B. Anoop, H. E. Patel, P. V. Harikrishna, T. Sundararajan, Sarit K. Das

Research output: Contribution to journalArticle

28 Citations (Scopus)


A detailed experimental study of flow through long microchannels of hydraulic diameter ranging from 60.5 to 211 μm has been carried out. The internal pressure distribution along the length of the channel has been measured to analyze the local flow behaviour. The effects of compressibility and transition to turbulence occurring in the microchannel flow were investigated in detail. In addition, the resulting flow has been analyzed numerically using a commercially available CFD code, FLUENT. It has been shown that there are no special micro-scale effects, including early transition to turbulence at least in the present range of hydraulic diameters after the significant effects of compressibility are accounted appropriately.

Original languageEnglish
Pages (from-to)2196-2204
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Issue number9-10
Publication statusPublished - 1 Apr 2009


  • Compressibility
  • Developing length
  • Gas flow
  • Liquid flow
  • Microchannel
  • Non-linearity
  • Transition
  • Transition to turbulence

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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