Dispersion in microchannels: The importance of the width

N. Bontoux, A. Ajdari, Howard A. Stone

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In this paper we highlight the fact that hydrodynamic dispersion in narrow microchannels is essentially controlled by the width of the cross-section rather than by the much thinner height of the channel. Using the lubrication approximation, we provide simple formulae that allow quantitative evaluation of dispersion in the long-time regime, which is effectively diffusive. These results have been verified experimentally in microchannels with a parabolic cross-section.

Original languageEnglish (US)
Title of host publicationMicro Total Analysis Systems - Proceedings of MicroTAS 2005 Conference
Subtitle of host publication9th International Conference on Miniaturized Systems for Chemistry and Life Sciences
PublisherTransducer Research Foundation
Pages100-102
Number of pages3
Volume1
ISBN (Print)0974361119, 9780974361116
StatePublished - Jan 1 2005
Externally publishedYes
Event9th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2005 - Boston, MA, United States
Duration: Oct 9 2005Oct 13 2005

Other

Other9th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2005
CountryUnited States
CityBoston, MA
Period10/9/0510/13/05

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Bioengineering

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  • Cite this

    Bontoux, N., Ajdari, A., & Stone, H. A. (2005). Dispersion in microchannels: The importance of the width. In Micro Total Analysis Systems - Proceedings of MicroTAS 2005 Conference: 9th International Conference on Miniaturized Systems for Chemistry and Life Sciences (Vol. 1, pp. 100-102). Transducer Research Foundation.