Numerical and analytical simulation of the production process of ZrO2 hollow particles

. In this paper, the production process of hollow particles from the agglomerated particles is addressed analytically and numerically. The important parameters affecting this process, in particular, the initial porosity level of particles and the plasma gun types are investigated. The analytical mod...

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Bibliographic Details
Published in:European physical journal plus 2017-12, Vol.132 (12), p.508, Article 508
Main Authors: Safaei, Hadi, Emami, Mohsen Davazdah
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Atomic
Complex Systems
Compressible flow
Condensed Matter Physics
Diameters
Disintegration
Mathematical and Computational Physics
Mathematical models
Molecular
Numerical models
Optical and Plasma Physics
Physics
Physics and Astronomy
Plasma guns
Porosity
Regular Article
Simulation
Theoretical
Two phase flow
Zirconium dioxide
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Summary:. In this paper, the production process of hollow particles from the agglomerated particles is addressed analytically and numerically. The important parameters affecting this process, in particular, the initial porosity level of particles and the plasma gun types are investigated. The analytical model adopts a combination of quasi-steady thermal equilibrium and mechanical balance. In the analytical model, the possibility of a solid core existing in agglomerated particles is examined. In this model, a range of particle diameters (50μm ≤ D p 0 ≤ 160 μ m) and various initial porosities ( 0 . 2 ≤ p ≤ 0 . 7 ) are considered. The numerical model employs the VOF technique for two-phase compressible flows. The production process of hollow particles from the agglomerated particles is simulated, considering an initial diameter of D p 0 = 60 μm and initial porosity of p = 0 . 3 , p = 0 . 5 , and p = 0 . 7 . Simulation results of the analytical model indicate that the solid core diameter is independent of the initial porosity, whereas the thickness of the particle shell strongly depends on the initial porosity. In both models, a hollow particle may hardly develop at small initial porosity values ( p < 0 . 3 ), while the particle disintegrates at high initial porosity values ( p > 0 . 6 .
ISSN:2190-5444
2190-5444
DOI:10.1140/epjp/i2017-11768-1