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The electromagnetic scattering problem of Laser‐Doppler Anemometry. Part I: Fluid investigation
Author(s) -
Raszillier Hans,
Durst Franz
Publication year - 1992
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.19920090115
Subject(s) - scattering , laser doppler velocimetry , optics , light scattering , signal (programming language) , physics , laser , doppler effect , particle (ecology) , mechanics , computer science , medicine , blood flow , astronomy , programming language , oceanography , geology
Light scattering by moving particles as used in laser‐Doppler anemometry (LDA) is reviewed. This first part of the review describes the situation where the scattering particles play the role of tracers of fluid flow. In this situation only general properties of the scattering process are of relevance. No special knowledge of the specific scattering mechanism is needed, provided that a detectable signal intensity is obtained. The velocity of the particle in a direction determined by the two laser beams of an LDA measuring device can be derived exclusively from the modulation frequency of the signal. In the second part of the review a description of specific properties of the scattering process will be given with the purpose of gaining information on the particles themselves.