Experiments in Fluids

, 47:721

Optical characterization of bubbly flows with a near-critical-angle scattering technique

  • Fabrice R. A. Onofri
  • Mariusz Krzysiek
  • Janusz Mroczka
  • Kuan-Fang Ren
  • Stefan Radev
  • Jean-Philippe Bonnet
Research Article

DOI: 10.1007/s00348-009-0649-y

Cite this article as:
Onofri, F.R.A., Krzysiek, M., Mroczka, J. et al. Exp Fluids (2009) 47: 721. doi:10.1007/s00348-009-0649-y

Abstract

The newly developed critical angle refractometry and sizing technique (CARS) allows simultaneous and instantaneous characterization of the local size distribution and the relative refractive index (i.e. composition) of a cloud of bubbles. The paper presents the recent improvement of this technique by comparison of different light scattering models and inversion procedures. Experimental results carried in various air/water and air/water-ethanol bubbly flows clearly demonstrate the efficiency and the potential of this technique.

Abbreviations

BSD

Bubble size distribution

CAM

Complex angular moment

CSP

Critical scattering pattern

CARS

Critical angle refractometry and sizing

GO

Geometrical optics

LMT

Lorenz-Mie theory

NNLSQ

Non-negative least square method

POA

Physical optics approximation

List of symbols

a

Particle radius

D

Particle diameter

m

Relative refractive index (mb/ms)

mb

Bubble refractive index

ms

Surrounding medium refractive index

p

Order of scattered rays

σD

Standard deviation of bubble diameters

θc

Critical angle

λ

Wavelength

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Fabrice R. A. Onofri
    • 1
  • Mariusz Krzysiek
    • 1
  • Janusz Mroczka
    • 2
  • Kuan-Fang Ren
    • 3
  • Stefan Radev
    • 4
  • Jean-Philippe Bonnet
    • 5
  1. 1.IUSTI, UMR n° 6595 CNRS, University of Provence, Polytech’DME, Technopôle Chateau-GombertMarseille Cedex 13France
  2. 2.CEPM, Technical University of WroclawWroclawPoland
  3. 3.CORIA, UMR n° 6614 CNRS, University of RouenSaint-Etienne-du-RouvrayFrance
  4. 4.IMECH, Bulgarian Academy of SciencesSofiaBulgaria
  5. 5.M2P2, UMR n° 6181 CNRS, University Paul CézanneAix-en-Provence Cedex 4France

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