Results 261 to 270 of about 287,424 (310)

Problem of determining the lewis number

Journal of engineering physics, 1981
Theoretical relations are derived for determining the Lewis number with the super-heat of water vapor taken into account.
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Deriving relations for the Lewis number

Journal of Engineering Physics, 1978
Experimentally confirmed theoretical relations are obtained for the ratio of the coefficients of heat and mass transfer (the Lewis number); an example of air and water in contact is given.
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The effect of Lewis number on radiative extinction and flamelet modeling

International Journal of Heat and Mass Transfer, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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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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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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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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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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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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