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Influence of surface roughness of conducting spheres on the response of a phase‐doppler anemometer
Author(s) -
Göbel Gerhard,
Doicu Adrian,
Bauckhage Klaus,
Wriedt Thomas
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.19970140605
Subject(s) - anemometer , spheres , surface roughness , phase (matter) , diffraction , materials science , optics , surface finish , doppler effect , particle (ecology) , reflection (computer programming) , surface (topology) , mechanics , physics , geology , composite material , geometry , mathematics , computer science , oceanography , quantum mechanics , astronomy , turbulence , programming language
Abstract The influence of the surface roughness of solid conducting spheres on the response of a phase‐Doppler anemometer (PDA) is described by using a ray theory model. A rough particle surface is modeled as an ensemble of distorted spheres. First‐ and second‐order reflection and diffraction are considered for far‐field calculations of the PDA phase difference. The numerical simulations are accompanied and supported by experimental results. Single rough Sn spheres are captured inside an electro‐dynamic trap and investigated with a standard phase‐Doppler system.