A new proof on net upscale energy cascade in two-dimensional and quasi-geostrophic turbulence

    Authors

    E. Gkioulekas;K. K. Tung

    Comments

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    Abbreviated Journal Title

    J. Fluid Mech.

    Keywords

    ENSTROPHY; SPECTRUM; PART; 2D; DIFFUSION; RANGES; Mechanics; Physics, Fluids & Plasmas

    Abstract

    A general proof that more energy flows upscale than downscale in two-dimensional turbulence and barotropic quasi-geostrophic (QG) turbulence is given. A proof is also given that in surface QG turbulence, the reverse is true. Though some of these results are known in restricted cases, the proofs given here are pedagogically simpler, require fewer assumptions and apply to both forced and unforced cases.

    Journal Title

    Journal of Fluid Mechanics

    Volume

    576

    Publication Date

    1-1-2007

    Document Type

    Article

    Language

    English

    First Page

    173

    Last Page

    189

    WOS Identifier

    WOS:000245907600006

    ISSN

    0022-1120

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