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Light scattering on oceanic turbulence.

Darek J Bogucki1, Julian A Domaradzki, Robert E Ecke

  • 1Rosenstiel School of Marine and Atmospheric Science, Division of Applied Marine Physics, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149-1098, USA. dbogucki@rsmas.miami.edu

Applied Optics
|November 13, 2004
PubMed
Summary

Optical measurements can quantify fluid flow turbulence by analyzing light scattering. This study quantifies turbulence-related scattering effects in oceanographic conditions using wave-front sensing.

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Area of Science:

  • Fluid dynamics
  • Optical physics
  • Oceanography

Background:

  • Turbulent fluid flow causes light scattering at near-forward angles.
  • This phenomenon offers a method for optical quantification of turbulence.
  • Understanding scattering is crucial for optical remote sensing in dynamic environments.

Purpose of the Study:

  • To measure the volume-scattering function of turbulent inhomogeneities.
  • To validate numerical models of turbulence-induced optical scattering.
  • To assess the impact of turbulence on optical measurements in oceanic conditions.

Main Methods:

  • Utilized a wave-front sensing technique to measure light scattering.
  • Performed measurements in the near-forward angular range (10^-7 to 10^-3 rad).

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  • Compared experimental data with numerical calculations of turbulent volume-scattering functions.

    • Main Results:

    • Measured the total scattering coefficient (b) between 1 and 10 m^-1 under typical oceanographic conditions.
    • Demonstrated good agreement between laboratory measurements and numerical calculations.
    • Confirmed that optical measurements at small angles are significantly affected by turbulence.

    Conclusions:

    • Optical scattering measurements are effective for quantifying fluid flow turbulence.
    • Wave-front sensing provides a viable method for such measurements.
    • Numerical models accurately predict turbulence-related scattering effects, aiding optical data interpretation.