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Thermal explosion of dispersed media: Critical conditions for discrete particles in an inert or a reactive matrix
Faculty
Not Specified
Year:
1996
Type of Publication:
Article
Pages:
383-392
Authors:
ElSayed, SA
DOI:
10.1016/S0950-4230(96)00032-0
Journal:
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES BUTTERWORTH-HEINEMANN LTD
Volume:
9
Research Area:
Engineering
ISSN
ISI:A1996VW27000003
Keywords :
explosion, dispersed media, discrete particles, inert and reactive matrix, critical conditions
Abstract:
Classical theories of explosion for isolated reactant particles are extended to cover the cases of reactant particles embedded in an inert (chemically) and a reactive matrix. In these cases the heat released or absorbed by particles influences the heat released or absorbed in the matrix. The critical conditions for ignition in the particles and matrix may be expressed in terms of the dimensionless groups of the classical theory psi and delta as well as some other important parameters such as beta, gamma or Bi-ov, which relate the physical properties of the particles and matrix. The different boundary conditions such as the Semenov boundary condition (uniform internal temperature systems) and the Frank-Kamenetskii boundary condition (distributed internal temperature systems) are investigated. Approximate solutions besides the exact ones are used in this study. Important results are obtained showing the effect of thermal interaction between particles and matrix. Copyright (C) 1996 Elsevier Science Ltd.
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