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Simultaneous Measurement of Velocity and Equivalent Diameter on Non‐Spherical Particles
Author(s) -
Morikita Hiroshi,
Hishida Koichi,
Maeda Masanobu
Publication year - 1994
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.19940110310
Subject(s) - optics , materials science , intensity (physics) , particle size , laser , particle (ecology) , volume (thermodynamics) , concentric , physics , chemistry , geometry , mathematics , oceanography , quantum mechanics , geology
The performance of a laser‐based optical technique to measure simultaneously the velocity and equivalent diameter of nonsphercial particles was evaluated. The size information was provided by the absolute intensity of diffractively scattered light by a particle crossing a single laser beam, which is concentric with a laser Doppler probe volume. The response curve (size‐intensity relationship) of the technique was estimated by calculations using the Fraunhofer approximation. Experiments with spherical glass and polyethylene and non‐spherical metal and ceramic particles ranging from 20 to 200 μm confirmed the operation of the technique and in all the measurements the maximum error of the average diameter was 10 μm as compared with size information provided by a microscope.