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A Criterion for the Experimental Validation of the Slip-Flow Models for Incompressible Rarefied Gases Through Microchannels

[+] Author Affiliations
G. L. Morini, M. Lorenzini

Università di Bologna, Bologna, Italy

M. Spiga

Università di Parma, Parma, Italy

Paper No. ICMM2004-2355, pp. 351-358; 8 pages
  • ASME 2004 2nd International Conference on Microchannels and Minichannels
  • ASME 2nd International Conference on Microchannels and Minichannels
  • Rochester, New York, USA, June 17–19, 2004
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4164-2
  • Copyright © 2004 by ASME


This paper is devoted to analyzing the friction factor of 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 experimental uncertainties on the evaluation of the friction factor.

Copyright © 2004 by ASME



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