CNCS Center for Nonlinear and Complex Systems
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Publications [#281485] of Gabriel G. Katul

Papers Published

  1. Katul, GG; Porporato, A; Nikora, V, Existence of k⁻¹ power-law scaling in the equilibrium regions of wall-bounded turbulence explained by Heisenberg's eddy viscosity., Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, vol. 86 no. 6 Pt 2 (December, 2012), pp. 066311, ISSN 1539-3755 [23368042], [doi]
    (last updated on 2022/05/20)

    The existence of a "-1" power-law scaling at low wavenumbers in the longitudinal velocity spectrum of wall-bounded turbulence was explained by multiple mechanisms; however, experimental support has not been uniform across laboratory studies. This letter shows that Heisenberg's eddy viscosity approach can provide a theoretical framework that bridges these multiple mechanisms and explains the elusiveness of the "-1" power law in some experiments. Novel theoretical outcomes are conjectured about the role of intermittency and very-large scale motions in modifying the k⁻¹ scaling.