Fundamental interactions of vortical structures with boundary layers in two-dimensional flows

E.A. Coutsias, Jens-Peter Lynov

    Research output: Contribution to journalJournal articleResearch

    Abstract

    The effect of no-slip walls on the evolution of coherent, vortical structures in two-dimensional flows is studied by numerical calculations. The calculations are based on an accurate and efficient spectral scheme which has been developed for the solution of the 2D Navier-Stokes equations in the vorticity-stream function representation for bounded geometries. Fundamental processes connected to vorticity detachment from the boundary layers caused by the proximity of vortical structures are described. These processes include enstrophy enhancement of the main flow during bursting events, and pinning down of vortex dipoles by "vortex shielding".
    Original languageEnglish
    JournalPhysica D: Nonlinear Phenomena
    Volume51
    Issue number1-3
    Pages (from-to)482-497
    ISSN0167-2789
    DOIs
    Publication statusPublished - 1991

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