Nonequilibrium structure of concentrated colloidal fluids under steady shear: leading-order response

Oliver Henrich, Oskar Pfeifroth, Matthias Fuchs

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    The flow-induced microstructural distortions of dense colloidal dispersions under steady shearing are derived within a recent first-principles approach to the nonlinear rheology of colloidal fluids and glasses. The stationary structure factor is discussed to leading orders in shear rate . We find that shear affects the stationary structure whenever the dressed Peclet/Weissenberg number becomes appreciable; here τ is the structural or α-relaxation time. Close to vitrification, this predicts significantly larger shear distortions than expected from considering the bare Peclet number Pe0; it compares with the diffusion time of a colloid at infinite dilution.

    Original languageEnglish
    Article number205132
    Number of pages6
    JournalJournal of Physics: Condensed Matter
    Issue number20
    Publication statusPublished - 25 Apr 2007


    • diffusion
    • microstructure
    • Peclet number
    • rheology
    • shear stress
    • structural relaxation

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