Numerical study of dispersion of a rough dense layer of particles under the action of an expanding shock wave

Interaction of an expanding shock wave with a layer of particles having a rough surface is considered within the framework of the collisional model of a gas suspension. The influence of roughness on the shape of the contact boundaries in the gas phase and on the boundaries of the cloud of particles...

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Bibliographic Details
Published in:Combustion, explosion, and shock waves explosion, and shock waves, 2017-11, Vol.53 (6), p.696-704
Main Authors: Khmel’, T. A., Fedorov, A. V.
Format: Article
Language:English
Subjects:
Boundaries
Classical and Continuum Physics
Classical Mechanics
Collision dynamics
Control
Dynamical Systems
Engineering
Galling
Mathematical models
Particle motion
Physical Chemistry
Physics
Physics and Astronomy
Shock wave interaction
Stability analysis
Vibration
Wave dispersion
Wave interaction
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Summary:Interaction of an expanding shock wave with a layer of particles having a rough surface is considered within the framework of the collisional model of a gas suspension. The influence of roughness on the shape of the contact boundaries in the gas phase and on the boundaries of the cloud of particles is analyzed. The development of the Richtmyer–Meshkov instability is demonstrated. Factors of particle dispersion are determined. Instability evolution is found to increase the amplitude of surface disturbances, and the development of collision dynamics favors smearing of finger-type structures. If the particle motion is essentially random, the pattern of cloud spreading is similar to that observed in experiments.
ISSN:0010-5082
1573-8345
DOI:10.1134/S0010508217060107