Results 161 to 170 of about 196,954 (212)

Effects of Lewis Number on Scalar Variance Transport in Premixed Flames

Flow, Turbulence and Combustion, 2010
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Chakraborty, Nilanjan, Swaminathan, Nedunchezian   +1 more
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Effects of Chemical Reaction on Gas Properties and Lewis Number

ARS Journal, 1962
Criteria for the maximum effect of chemical reaction on thermal properties such as heat capacity, thermal conductivity, and coefficient of thermal expansion of interest in heat transfer processes are examined for gaseous systems of the type where a single equilibrium reaction between reactants and products occurs.
STEPHEN S. T. FAN, DAVID M. MASON
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Lewis Number Effect on Smoldering Combustion of a Thin Solid

Combustion Science and Technology, 2014
This article presents a simple model to describe the smoldering combustion of a thin solid burning in a narrow gap. Smoldering front under such a condition is unstable because of a similar instability mechanism to gaseous premixed combustion and produces a fingering pattern.
Kazunori Kuwana, Genichiro Kushida, Yosuke Uchida   +2 more
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The effect of Lewis number on radiative extinction and flamelet modeling

International Journal of Heat and Mass Transfer, 2002
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Effects of Lewis number on the burning intensity of Bunsen flames

Combustion and Flame, 1987
Abstract Effects of Lewis number on the burning intensity of Bunsen flames have been elucidated for various combinations of fuel/inert gasoxygen systematically, paying attention to the effects of transport properties of the mixture such as thermal diffusivity and mass diffusivity.
M. Mizomoto, H. Yoshida
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Effects of fuel Lewis number on flame spread over solids

Proceedings of the Combustion Institute, 2005
Abstract Using a detailed two-dimensional numerical model, a systematic investigation has been made to study the effect of fuel Lewis number (Le F  =  α /D F ) and mass transfer on flame spread over thin solids. The fuel Lewis number affects the flame spread rates for both concurrent and opposed flames over thin fuels.
Kevin Tolejko, Ioan I. Feier, James S. T’ien   +2 more
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Effect of Lewis number on flame propagation through vortical flows

Combustion and Flame, 2005
The premixed gas flame spreading through an array of large-scale vortices is studied numerically. It is found that the flame speed is a nonmonotonic function of the stirring intensity. At sufficiently low Lewis numbers (Le 1. At Le 1 the deficient reactant is fully consumed up to the very quenching point.
L. Kagan, G. Sivashinsky
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Numerical simulations of Lewis number effects in turbulent premixed flames

Journal of Fluid Mechanics, 1992
The structure of a premixed flame front propagating in a region of two-dimensional turbulence is investigated using full numerical simulation including heat release, variable properties, and one-step Arrhenius chemistry. The influence of reactant Lewis number (Le = ratio of thermal to species diffusivity) is reported for Le = 0.8, Le = 1.0, and Le = 1 ...
D. C. Haworth, T. J. Poinsot
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Effects of Lewis numbers and kinetics on spontaneous ignition of hydrogen jets

Proceedings of the Combustion Institute, 2017
Abstract The transient process following a hydrogen leak into the atmosphere initiates as a contact surface appears separating air heated by the leading shock from hydrogen cooled by expansion. Diffusion of heat and species produces reactive mixture, potentially leading to ignition.
E. Bourgin, M.M. Alves, C. Yang, F.F. Fachini, L. Bauwens   +4 more
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Lewis number effect on the propagation of premixed flames in closed tubes

Combustion and Flame, 1992
The evolution of a premixed flame under conditions of confinement is studied theoretically. The analysis is based on a hydrodynamic model in which the flame is treated as a surface of discontinuity. The flame structure is assumed to be quasi-steady with a high activation energy and a large heat release.
J.L. Mcgreevy, M. Matalon
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