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Light Scattering by Homogeneous Axisymmetric Particles for PDA Calculations to Measure Both Axes of Spheroidal Particles
Author(s) -
Doicu Adrian,
Wriedt Thomas,
Bauckhage Klaus
Publication year - 1997
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.199700003
Subject(s) - doppler effect , physics , measure (data warehouse) , scattering , optics , refraction , anemometer , computation , phase (matter) , computational physics , particle (ecology) , boundary value problem , rotational symmetry , light scattering , signal (programming language) , field (mathematics) , classical mechanics , mechanics , mathematics , turbulence , computer science , quantum mechanics , geology , oceanography , algorithm , database , pure mathematics , programming language
Mathematical tools are provided for the computation of the scattered field produced by a non‐spherical particle moving through the measurement volume of a phase Doppler anemometer. The Doppler signal is modeled by using the rigorous extended boundary condition method and an approximate ray theory. The region of applicability of ray theory is discussed. In particular, a pure refraction model is considered for large particles. It is shown that under some circumstances the phase Doppler technique may be used for sizing of spheroidal particles.