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

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Abstract

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.

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Acknowledgements

This work has been funded through grant I/R/266/02 by ASI (Italian Space Agency) and COFIN 03 by MIUR-URST.

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Authors and Affiliations

  1. DIENCA, Università di Bologna, Viale Risorgimento 2, 40136, Bologna, Italy

    Gian Luca Morini & Marco Lorenzini

  2. Dipartimento di Ingegneria Industriale, Parco Area delle Scienze 181, 43100, Parma, Italy

    Marco Spiga

Authors
  1. Gian Luca Morini
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  2. Marco Lorenzini
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  3. Marco Spiga
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Correspondence to Gian Luca Morini.

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Morini, G.L., Lorenzini, M. & Spiga, M. A criterion for experimental validation of slip-flow models for incompressible rarefied gases through microchannels. Microfluid Nanofluid 1, 190–196 (2005). https://doi.org/10.1007/s10404-004-0028-1

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  • DOI: https://doi.org/10.1007/s10404-004-0028-1

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