Abstract
The von Kármán spectra of turbulent temperature andvelocity fluctuations have been widely used in the literature on turbulenceand electromagnetic, seismic, and acoustic wave propagation in random media.In this paper we provide a phenomenological motivation for the vonKármán velocity spectrum in terms of the quasi-wavelet model ofturbulence developed recently. In this model, turbulence is represented as asuperposition of self-similar localized eddies of many different scales. Wefind a functional form for these eddies that yields the von Kármán velocity spectrum exactly. We also show that other eddy functions producevelocity spectra that have the same general form as the von Kármán spectrum, and we consider possible quasi-wavelet representations of the`Kansas' spectrum and the `-1' spectrum. We also present asystematic determination, based on turbulence similarity theories, of theparameters of the von Kármán spectra of temperature and velocityfluctuations in an unstable atmospheric boundary layer.
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Goedecke, G.H., Ostashev, V.E., Wilson, D.K. et al. Quasi-Wavelet Model of Von Kármán Spectrum of Turbulent Velocity Fluctuations. Boundary-Layer Meteorology 112, 33–56 (2004). https://doi.org/10.1023/B:BOUN.0000020158.10053.ab
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DOI: https://doi.org/10.1023/B:BOUN.0000020158.10053.ab