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International Journal of Fluid Mechanics Research
ESCI SJR: 0.22 SNIP: 0.446 CiteScore™: 0.5

ISSN Imprimer: 2152-5102
ISSN En ligne: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v38.i4.60
pages 366-386

Wave Propagation in Turbulent Sea Water

Y. Lacroix
Laboratoire des Systémes Navals Complexes, Toulon, France
D. Leandri
Laboratoire des Systémes Navals Complexes, Toulon, France
V. I. Nikishov
Institute of Hydromechanics of National Academy of Sciences of Ukraine, 8/4, Zhelyabov St., Kyiv, 03057, Ukraine

RÉSUMÉ

Characteristics of light wave propagating in a turbulent sea water are determined by fluctuation spectrum of optical refractive index n. The behavior of the spectrum is controlled by fluctuations of temperature and salinity. Acoustic scattering from oceanic microstructure is due to sound speed and density fluctuations that in turn also depend on the temperature and salinity fluctuations. The work gives a short description of the spectrum model of fluctuations of optical refractive index depending on dissipation rates of component fluctuations, as well as the dissipation rates of turbulent energy, which describes both inertial-convective and viscous-convective subranges. Others values, like n (density, conductivity, sound speed), can be also considered. Some statistical characteristics of the light wave for real distributions of T and S in depth were calculated by the methods of geometric optics and smooth perturbations using the developed spectrum model. It was shown that the above spectrum peculiarities lead to considerable changes of statistical characteristics of propagating waves, in particular, level fluctuations, correlation function of the level fluctuation, structural function of the phase.


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