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Experimental Mechanics

, Volume 22, Issue 1, pp 1–7 | Cite as

Study of basic patterns of light scattering in aqueous solution of milling yellow

An experimental method for the determination of characteristics of light scattering in photoviscous materials is presented. Implications of the determined characteristics on the application of scattered-light technique in flow analysis are assessed
  • A. R. Krishnamurthy
  • J. T. Pindera
Article

Abstract

Basic characteristics of light scattering in an aqueous solution of milling yellow are presented in a form of relations between the scattered radiant power, states of polarization of primary radiation and scattered radiation, observation angle and azimuthal angle.

It is found that the state of polarization of the scattered light in milling-yellow solution can be utilized as a foundation of reliable photoelastic scattered-light techniques for flow analysis. However, Rayleight's model of scattering is nnt directly applicable.

Paper contains data on major parameters of light scattering, knowledge of which is necessary to correctly design flowbirefringence experiments. In particular, these data can be used to develop a set of conditions and constraints for designing of particular scattered-light flow-birefringence experiments, and of corresponding transfer functions.

Keywords

Radiation Aqueous Solution Milling Transfer Function Fluid Dynamics 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of Symbols

a

radius of scattering spherical particle

C

concentration of the birefringent solution

Hv,Hh

linearly polarized scattered-light component vibrating in the plane of observation when the linearly polarized primary beam is vibrating in a plane normal to the plane of observation, and vibrating in the plane of observation, respectively, for the direction of observation θ=π/2

Vv,Vh

linearly polarized scattered-light components vibrating in a plane normal to the plane of observation when the linearly polarized primary beam is vibrating in a plane normal to the plane of observation, and vibrating in the plane of observation, respectively, for the direction of observation, θ=π/2

Io,Is

intensities of primary beam and of scattered beam, respectively, in the solution at rest

Iθ,Iϕ

intensities of scattered beam in the plane of observation, and in a plane normal to the plane of observation, respectively, for the direction of observation given by the angle θ, and for linearly polarized primary beam vibrating at the azimuthal angle ϕ

k

parameter of scattering

M

multiplication constant of the phototube

n

average refractive index

r

distance from the scattering particles to the point of observation; normalized intensity of scattered light

Sp

sensitivity of the photocathode (A/W)

T

temperature

t

time; duration of standing; age

λ

radiation wavelength

ϱ

depolarization ratio

θ

observation angle

ϕ

azimuthal angle between the linearly polarized primary beam and the observation plane

ψ

azimuth of the linearly polarized scattered beam with respect to the observation plane

Δψ

relative phase retardation

Ω

load resistance

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Copyright information

© Society for Experimental Mechanics, Inc. 1982

Authors and Affiliations

  • A. R. Krishnamurthy
    • 1
  • J. T. Pindera
    • 2
  1. 1.Jyoti LimitedBarodoIndia
  2. 2.University of WaterlooWaterlooCanada

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