Results 221 to 230 of about 259,824 (268)

The effect of Lewis number on radiative extinction and flamelet modeling

International Journal of Heat and Mass Transfer, 2002
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Anomalous lewis number effects in tribrachial flames

Symposium (International) on Combustion, 1989
Tribrachial (three-armed) flames are generated when a premixed flame propagates into a nonuniform mixture, and consist of a fuel-rich branch joined to a fuel-lean branch, with a diffusion flame trailing from the junction (the stoichiometric point). They are important in the context of ‘laminar flamelet’ models of turbulent non-premixed flames.
J. Buckmaster, M. Matalon
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“The System of Odd and Even Numbers”: Lewis Namier the Diplomatic Historian [PDF]

Diplomacy & Statecraft, 2021
Sir Lewis Namier has left a deep, if contested, imprint on studies of eighteenth-century British political history.
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On the number of complete extensions of the Lewis systems of sentential calculus

Journal of Symbolic Logic, 1944
We say that a system S of sentential calculus is an extension of a system R, if R and S have the same class of (meaningful) sentences, and every provable sentence of R is also provable in S. If the two classes of provable sentences do not coincide, we call S a proper extension of R.
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Pulsating and hydrodynamic instabilities at large Lewis numbers

Combustion and Flame, 2006
The dynamic behavior of freely propagating premixed flames with large Lewis numbers was computationally simulated using a sixth-order central difference scheme and nonreflective boundary conditions. Results in the linear stage of the instability growth show that the growth rate dramatically decreases with increasing Lewis number and that the large ...
Jiao Yuan, Yiguang Ju, Chung K. Law
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Lewis-number effects on edge-flame propagation

Journal of Fluid Mechanics, 2002
Activation-energy asymptotics is employed to explore effects of the Lewis number, the ratio of thermal to fuel diffusivity, in a one-dimensional model of steady motion of edges of reaction sheets. The propagation velocity of the edge is obtained as a function of the relevant Damköhler number, the ratio of the diffusion time to the chemical time ...
Nayagam, Vedha, Williams, F. A.
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Heat capacity and the Lewis number of a reacting gas.

AIAA Journal, 1966
Heat capacity expression due to chemical reaction, relating composition variations and binary diffusion coefficient with Lewis number, presenting integral equation for system ...
ROGER A. SVEHLA, RICHARD S. BROKAW
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Liquid-fuel burning with nonunitary Lewis number

Combustion and Flame, 2007
An analysis is presented for liquid-fuel vaporization and burning with nonunitary Lewis number (i.e., nonsimilar heat and mass diffusion) in a general geometrical situation, e.g., a dense spray. Variable transport properties are considered and only Stefan flow is allowed.
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Diffusion Flame Calculations for Nonunity Lewis Number

Combustion Science and Technology, 1982
Abstract Numerical solutions for the problem of a free convection, diffusion flame burning on a vertical fuel surface have been obtained for Lewis number from 0·05 to 10. Results are presented for the effect of Lewis number on the temperature and concentration profiles and on the burning rate.
M. SIBULKIN, S. F. MALARY
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Extinction of diffusion flames with nonunity Lewis numbers

Journal of Engineering Mathematics, 1997
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Kim, J. S., Williams, F. A.
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