Turbulence spectra generated by singularities

E. A. Kuznetsov

    Research output: Contribution to journalArticlepeer-review

    50 Citations (Scopus)

    Abstract

    The problem of turbulence spectra generated by the singularities located on lines and planes is considered. It is shown that the frequency spectrum of fluid-surface displacements due to whitecaps (linear singularities) is scaled like a weakly turbulent Zakharov-Filonenko spectrum. The corresponding wave-vector spectrum may be highly anisotropic with a decrease in maximum, as in the Phillips spectrum. However, in the isotropic situation, the spectrum differs markedly from the Phillips form. For a highly anisotropic two-dimensional turbulence, the vorticity jumps can generate the Kraichnan power-law distribution in the region of maximal angular peak. For the isotropic distribution, the turbulence spectrum coincides with the Saffman spectrum. For the shock-generated acoustic turbulence, the spectrum has the form of the Kadomtsev-Petviashvili spectrum E(ω) ∼ ω(-2) for all spatial dimensionalities.

    Original languageEnglish
    Pages (from-to)83-89
    Number of pages7
    JournalJETP Letters
    Volume80
    Issue number2
    DOIs
    Publication statusPublished - 2004

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