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Particle Breakup in Shock Waves Studies by single Particle Light Scattering
Author(s) -
Strecker Jörgt J. F.,
Roth Paul
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.19940110309
Subject(s) - breakup , shock wave , scattering , particle (ecology) , shock (circulatory) , light scattering , materials science , mechanics , particle size , laser , optics , molecular physics , physics , chemistry , medicine , oceanography , geology
The breakup of suspended, agglomerated submicron particles was studied by exposing the aerosol to weak shock waves of varying strength under conditions 400 ms −1 ⩽v⩽880 ms −1 . A newly developed laser light‐scattering diagnostic employing a top hat laser profile was used to size the particles passing through a very small scattering volume. By Comparing the optically measured particle size in front of and behind shock waves, the breakup of agglomerated particles could be clearly identified. The experiments indicate that the aerodynamic forces behind an incident shock overcome the particle binding force resulting in disintegration of the submicron agglomerates. The results are presented in form of a modified Weber number.