THERMAL SCIENCE

International Scientific Journal

Predrag Lj Stefanović

,

Dejan B. Cvetinović

,

Goran S. Živković

,

Simeon Oka

,

Pavle Pavlović

NUMERICAL MODELING OF DISPERSE MATERIAL EVAPORATION IN AXISYMMETRIC THERMAL PLASMA REACTOR

ABSTRACT
A numerical 3D Euler-Lagrangian stochastic-deterministic (LSD) model of two-phase flow laden with solid particles was developed. The model includes the relevant physical effects, namely phase interaction, panicle dispersion by turbulence, lift forces, particle-particle collisions, particle-wall collisions, heat and mass transfer between phases, melting and evaporation of particles, vapour diffusion in the gas flow. It was applied to simulate the processes in thermal plasma reactors, designed for the production of the ceramic powders. Paper presents results of extensive numerical simulation provided (a) to determine critical mechanism of interphase heat and mass transfer in plasma flows, (b) to show relative influence of some plasma reactor parameters on solid precursor evaporation efficiency: 1 - inlet plasma temperature, 2 - inlet plasma velocity, 3 - particle initial diameter, 4 - particle injection angle a, and 5 - reactor wall temperature, (c) to analyze the possibilities for high evaporation efficiency of different starting solid precursors (Si, Al, Ti, and B2O3 powder), and (d) to compare different plasma reactor configurations in conjunction with disperse material evaporation efficiency.
KEYWORDS
two-phase flow, thermal plasma, heat and mass transfer, turbulence, solid particles evaporation, ceramic powders synthesis, numerical modeling
PAPER SUBMITTED: 2003-04-25
PAPER REVISED: 2003-06-20
PAPER ACCEPTED: 2003-07-08
DOI REFERENCE: https://doi.org/10.2298/TSCI0301063S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2003, VOLUME 7, ISSUE Issue 1, PAGES [63 - 100]
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Numerical modeling of disperse material evaporation in axisymmetric thermal plasma reactor

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