Advances in quasielastic scattering of light with emphasis on simultaneous measurements of velocities and sizes of particles embedded in flows
Abstract
Advances in quasielastic scattering of light are studied, and the theoretical analysis includes: (1) a generalized LorenzMie theory (GLMT), describing the quasielastic linear scattering of light; (2) a computer program using the Lentz algorithm to compute ratios of Bessel functions; (3) a comparative analysis of the GLMT and geometrical optics; and (4) a discussion of new monotonic relationships between scattered powers and the sizes of scatter centers. The theoretical results are applied to the experimental study which attempts to measure simultaneously the diameter and velocity of individual particles embedded in laminar and turbulent twophase flows, illuminated by a laser beam. Results show a satisfactory agreement with the theoretical predictions, and it is concluded that simultaneous velocimetry of single particles can be achieved by superimposing on the sizing probe a classical LDV control volume.
 Publication:

AIAA, 16th Thermophysics Conference
 Pub Date:
 June 1981
 Bibcode:
 1981thph.confR....G
 Keywords:

 Elastic Scattering;
 Geometrical Optics;
 Light Scattering;
 Particle Motion;
 Particle Size Distribution;
 Two Phase Flow;
 Algorithms;
 Bessel Functions;
 Computer Techniques;
 Monotone Functions;
 Instrumentation and Photography