A numerical study of a two-dimensional model for premixed gas combustion in
a narrow, semi-infinite channel with no-slip boundary condition is performed. The work
is motivated by recent theoretical advances revealing the major role of hydraulic resistance
in deflagration-to-detonation transition, one of the central yet still inadequately understood
phenomena of gaseous combustion. The work is a continuation and extension of recently
reported results over non-isothermal boundary conditions, wider...
The present work is a continuation of previous studies of premixed gas flames
spreading through a space-periodic array of large-scale vorticities, and is motivated by the
experimentally known phenomenon of flame extinction by turbulence. The prior work dealt
with the strongly non-stoichiometric limit where the reaction rate is controlled by a single
(deficient) reactant. In the present study the discussion is extended over a physically more
realistic formulation based on a bimolecular reaction...
The experimentally known phenomenon of oscillatory instability in convective burning of
porous explosives is discussed. A simple phenomenological model accounting for the
ejection of unburned particles from the consolidated charge is formulated and analyzed. It
is shown that the post-front hydraulic resistance induced by the ejected particles
provides a mechanism for the oscillatory burning.
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