Vortex merging and spectral cascade in two-dimensional flows

    Research output: Contribution to journalJournal articleResearch


    The merging of two identical vortices is studied numerically using a spectral code. It is noted that the enstrophy cascade is most active on the distorted vortex boundaries, with a Kolmogorov-like spectrum E(k) approximate to k(-alpha), alpha less than or equal to 4, developed at high wave numbers. The inverse energy cascade is completed when the vortices merge into one of larger size. (C) 1996 American Institute of Physics.
    Original languageEnglish
    JournalPhysics of Fluids
    Issue number9
    Pages (from-to)2263-2265
    Publication statusPublished - 1996


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