Microfluidics and Nanofluidics

, Volume 1, Issue 2, pp 190–196

A criterion for experimental validation of slip-flow models for incompressible rarefied gases through microchannels

Research Paper


This paper is devoted to analysing the friction factor for incompressible rarefied gas flow through microchannels. A theoretical investigation is conducted in order to underline the conditions for experimentally evidencing rarefaction effects on the pressure drop. It is demonstrated that for a fixed geometry of the microchannel cross-section, it is possible to calculate the minimum value of the Knudsen number for which the rarefaction effects can be observed experimentally, taking into account the uncertainties related to evaluation of the friction factor.


Microchannels Rarefied gas Slip-flow Pressure drop Experimental uncertainty 

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Gian Luca Morini
    • 1
  • Marco Lorenzini
    • 1
  • Marco Spiga
    • 2
  1. 1.DIENCAUniversità di BolognaBolognaItaly
  2. 2.Dipartimento di Ingegneria IndustrialeParmaItaly

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