Evidence of shear-dependent boundary slip in newtonian liquids

C. Neto*, V. S.J. Craig, D. R.M. Williams

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    52 Citations (Scopus)

    Abstract

    The flow of Newtonian fluids was studied by directly measuring the hydro-dynamic drainage force acting on a sphere approaching a flat surface. Our force measurements provide clear evidence of boundary slip and show that the degree of boundary slip is a function of the liquid viscosity and the shear rate. A shear-dependent boundary slippage was also observed in experiments with a, polymer (PDMS). The liquids wetted the bounding surfaces either partially or completely. Our results have important consequences for the design of microfluidic devices, and in technological processes, such as lubrication and permeability of microporous media.

    Original languageEnglish
    Pages (from-to)59-62
    Number of pages4
    JournalEuropean Physical Journal E
    Volume12
    Issue numberSUPPL. 1
    DOIs
    Publication statusPublished - 2003

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