Electroviscous effects in capillary filling of nanochannels

Asger Mortensen, Anders Kristensen

    Research output: Contribution to journalJournal articleResearchpeer-review

    325 Downloads (Pure)

    Abstract

    We theoretically examine the widespread hypothesis of an electroviscous origin of the increase in apparent viscosity observed in recent experiments on capillary filling of nanochannels. Including Debye-layer corrections to the hydraulic resistance, we find that the apparent viscosity reaches a maximum in the mesoscopic regime where the channel height (or more generally the hydraulic radius) is comparable to the screening length. However, for realistic estimates of central parameters, we find that the electroviscous contribution to the apparent viscosity is at most a 1% effect.
    Original languageEnglish
    JournalApplied Physics Letters
    Volume92
    Issue number6
    Pages (from-to)063110
    ISSN0003-6951
    DOIs
    Publication statusPublished - 2008

    Bibliographical note

    Copyright (2008) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

    Keywords

    • TRANSPORT
    • CHANNELS

    Cite this