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Title: Optical fiber measurements of particle concentration in dense suspensions: calibration and simulation

Abstract

A fiber-optic sensor that measures the particle volume fraction in dense suspensions is calibrated against a quantitative capacitance probe. For homogeneous, dense, random suspensions of smooth, monodisperse, transparent dielectric spheres, the calibration is simulated by using a ray-tracing Monte Carlo algorithm that predicts systematic uncertainties of the sensor's output, the extent of its measurement volume, and the effects of changing its optical properties. The simulation shows that the output and accuracy of the sensor increase with a decreasing sphere diameter and with an increasing N.A. of the fiber. The output also increases when the ratio of the indices of refraction of the sphere and the suspending medium is increased. For small particles the measurement volume scales as the average interparticle distance.

Authors:
;  [1]
  1. Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853 (United States)
Publication Date:
OSTI Identifier:
7009548
DOE Contract Number:  
AC22-88PC88947
Resource Type:
Journal Article
Journal Name:
Applied Optics; (United States)
Additional Journal Information:
Journal Volume: 31:24; Journal ID: ISSN 0003-6935
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; FLOWMETERS; DESIGN; OPTICAL FIBERS; USES; SUSPENSIONS; BACKSCATTERING; CALIBRATION; MONTE CARLO METHOD; DISPERSIONS; FIBERS; MEASURING INSTRUMENTS; METERS; SCATTERING; 440600* - Optical Instrumentation- (1990-)

Citation Formats

Lischer, D J, and Louge, M Y. Optical fiber measurements of particle concentration in dense suspensions: calibration and simulation. United States: N. p., 1992. Web. doi:10.1364/AO.31.005106.
Lischer, D J, & Louge, M Y. Optical fiber measurements of particle concentration in dense suspensions: calibration and simulation. United States. https://doi.org/10.1364/AO.31.005106
Lischer, D J, and Louge, M Y. 1992. "Optical fiber measurements of particle concentration in dense suspensions: calibration and simulation". United States. https://doi.org/10.1364/AO.31.005106.
@article{osti_7009548,
title = {Optical fiber measurements of particle concentration in dense suspensions: calibration and simulation},
author = {Lischer, D J and Louge, M Y},
abstractNote = {A fiber-optic sensor that measures the particle volume fraction in dense suspensions is calibrated against a quantitative capacitance probe. For homogeneous, dense, random suspensions of smooth, monodisperse, transparent dielectric spheres, the calibration is simulated by using a ray-tracing Monte Carlo algorithm that predicts systematic uncertainties of the sensor's output, the extent of its measurement volume, and the effects of changing its optical properties. The simulation shows that the output and accuracy of the sensor increase with a decreasing sphere diameter and with an increasing N.A. of the fiber. The output also increases when the ratio of the indices of refraction of the sphere and the suspending medium is increased. For small particles the measurement volume scales as the average interparticle distance.},
doi = {10.1364/AO.31.005106},
url = {https://www.osti.gov/biblio/7009548}, journal = {Applied Optics; (United States)},
issn = {0003-6935},
number = ,
volume = 31:24,
place = {United States},
year = {Thu Aug 20 00:00:00 EDT 1992},
month = {Thu Aug 20 00:00:00 EDT 1992}
}