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Heat Transfer Research
Fator do impacto: 0.404 FI de cinco anos: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561

Volumes:
Volume 50, 2019 Volume 49, 2018 Volume 48, 2017 Volume 47, 2016 Volume 46, 2015 Volume 45, 2014 Volume 44, 2013 Volume 43, 2012 Volume 42, 2011 Volume 41, 2010 Volume 40, 2009 Volume 39, 2008 Volume 38, 2007 Volume 37, 2006 Volume 36, 2005 Volume 35, 2004 Volume 34, 2003 Volume 33, 2002 Volume 32, 2001 Volume 31, 2000 Volume 30, 1999 Volume 29, 1998 Volume 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.v38.i1.60
pages 57-69

Critical Phenomena and Structural Effects in Combustion of Disordered Heterogeneous Mixtures

P. S. Grinchuk
A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, Minsk, Belarus
O. S. Rabinovich
A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, Minsk, Belarus

RESUMO

Numerical modeling methods were applied to investigate propagation of combustion waves in two-component heterogeneous media. The main attention was paid to identification of the role of a random distribution of the combustible mixture components in the propagation of combustion waves. Mixtures of the "fuel-inert filler" type and two-reagent mixtures were analyzed. It was shown that the random structure of such mixtures manifests itself most strongly in critical phenomena, characteristic of combustion processes, above all, within the concentration and thermal limits of combustion. Taking into account the random nature of the internal structure of mixtures allows a natural description of the experimentally observed percolating mode of the combustion wave propagation over an "infinite" cluster, formed by combustible elements of the mixture. A single criterion, combining physico-chemical and structural characteristics of the medium, has been found; a value of this criterion determines the transition from the frontal mode of the combustion wave propagation to the percolation mode.


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