Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Photon correlation spectroscopy on flowing polydisperse fluid-particle systems: theory

Not Accessible

Your library or personal account may give you access

Abstract

We develop an analytical expression for the homodyne autocorrelation function of laser light scattered by a laminar flow of a polydisperse particle-fluid system. In contrast to the already existing literature on the development of autocorrelation functions, we explicitly begin with the effects of the finite linewidth of the light source, the spatial and temporal intensity averaging that is due to the detection process, the Brownian particle movement on the amplitudes of the scattered light waves as well as on the degree of resolution that we introduce in this paper, and a general system velocity v= (v x, v y, v z). One main result is a new physical interpretation of the well-known, generally empirically introduced coherence factor. Quantities that are comparable to the well-known degree of coherence, coherence area, and number of coherence areas have also been obtained. Finally the investigations are simplified to an autocorrelation function that can be used for the analysis of fluid-particle systems in the low Knudsen number regime. It is shown that in this case particle size or size distribution, system velocity, and particle concentration can be obtained simultaneously. The developed autocorrelation function is related to frequently analyzed special cases and compared with expressions from the literature.

© 1998 Optical Society of America

Full Article  |  PDF Article
More Like This
Application of photon correlation spectroscopy to flowing Brownian motion systems

D. P. Chowdhury, C. M. Sorensen, T. W. Taylor, J. F. Merklin, and T. W. Lester
Appl. Opt. 23(22) 4149-4154 (1984)

Gaussian beam effects on the photon correlation spectrum from a flowing Brownian motion system

Thomas W. Taylor and Christopher M. Sorensen
Appl. Opt. 25(14) 2421-2426 (1986)

Flow Tracing Fidelity of Scattering Aerosol in Laser Doppler Velocimetry

M. K. Mazumder and K. J. Kirsch
Appl. Opt. 14(4) 894-901 (1975)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (70)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved