Microscopic Slip Boundary Conditions in Unsteady Fluid Flows

J. A. De La Torre, D. Duque-Zumajo, D. Camargo, Pep Español

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    Resumen

    An algebraic tail in the Green-Kubo integral for the solid-fluid friction coefficient hampers its use in the determination of the slip length. A simple theory for discrete nonlocal hydrodynamics near parallel solid walls with extended friction forces is given. We explain the origin of the algebraic tail and give a solution of the plateau problem in the Green-Kubo expressions. We derive the slip boundary condition with a microscopic expression for the slip length and the hydrodynamic wall position, and assess it through simulations of an unsteady plug flow.

    Idioma originalInglés
    Número de artículo264501
    PublicaciónPhysical Review Letters
    Volumen123
    N.º26
    DOI
    EstadoPublicada - 24 dic. 2019

    Nota bibliográfica

    Publisher Copyright:
    © 2019 American Physical Society.

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