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Liquid transport due to light scattering.

Robert D Schroll1, Régis Wunenburger, Alexis Casner

  • 1Physics Department and the James Franck Institute, University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA.

Physical Review Letters
|May 16, 2007
PubMed
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Light scattering in fluids with refractive index fluctuations can create large-scale flows. Experiments show laser-induced scattering drives interface deformation and liquid jet formation, confirming this mechanism.

Area of Science:

  • Fluid dynamics
  • Light scattering phenomena
  • Non-equilibrium systems

Background:

  • Fluctuations in refractive index within fluids can arise from various physical processes.
  • Understanding how these fluctuations interact with light is crucial for fluid dynamics.
  • Previous research has not fully elucidated the link between light scattering and induced fluid flow.

Purpose of the Study:

  • To investigate the mechanism by which light scattering drives fluid flow.
  • To demonstrate that refractive index inhomogeneities can induce large-scale fluid motion.
  • To experimentally validate the theory of scattering-induced flow.

Main Methods:

  • Utilizing experiments with a near-critical, phase-separated liquid exhibiting significant refractive index fluctuations.

Related Experiment Videos

  • Employing a laser beam to probe the fluid and induce interface deformation.
  • Comparing experimental measurements of deformation with theoretical calculations based on scattering-induced flow.

    • Main Results:

    • Observed that light scattering by refractive index inhomogeneities drives large-scale fluid flow.
    • Demonstrated laser-induced interface deformation and liquid jet formation.
    • Achieved good agreement between experimental data and theoretical predictions for deformation, supporting the scattering-induced flow mechanism.

    Conclusions:

    • Light scattering is a viable mechanism for generating macroscopic fluid flows in specific conditions.
    • The phenomenon is driven by refractive index fluctuations within the fluid.
    • Experimental results validate the theoretical model of scattering-induced flow.