Two-dimensional convective turbulence

A. V. Gruzinov, Nikolai Kukharkin, R. N. Sudan

    Research output: Contribution to journalArticle

    Abstract

    We show that 2D E × B ionospheric turbulence of the electron density in the equatorial electrojet is isomorphic to the viscous convection of an ordinary fluid in a porous medium due to temperature gradients. Numerical simulations reveal the strong anisotropy in the turbulence, which consists of rising hot bubbles and falling cool bubbles. These bubbles break up into fingers leading to the formation of stable shear flows. After reaching a quasisteady state, the omnidirectional energy spectrum approaches a k−2 behavior, rather than k−5/3 as expected from isotropic turbulence. Physical mechanisms that lead to anisotropy are analyzed.

    Original languageEnglish (US)
    Pages (from-to)1260-1263
    Number of pages4
    JournalPhysical Review Letters
    Volume76
    Issue number8
    DOIs
    StatePublished - Jan 1 1996

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    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Gruzinov, A. V., Kukharkin, N., & Sudan, R. N. (1996). Two-dimensional convective turbulence. Physical Review Letters, 76(8), 1260-1263. https://doi.org/10.1103/PhysRevLett.76.1260