Results 11 to 20 of about 259,824 (268)
Cation affinity numbers of Lewis bases [PDF]
Beilstein Journal of Organic Chemistry, 2012 Using selected theoretical methods the affinity of a large range of Lewis bases towards model cations has been quantified. The range of model cations includes the methyl cation as the smallest carbon-centered electrophile, the benzhydryl and trityl cations as models for electrophilic substrates encountered in Lewis base-catalyzed synthetic procedures ...
Christoph Lindner +4 more
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Lewis number effects in distributed flames [PDF]
Proceedings of the Combustion Institute, 2011 Abstract Recent computational studies have simulated a mode of distributed premixed combustion where turbulent mixing plays a significant role in the transport of mass and heat near the reaction zone. Under these conditions, molecular transport processes play a correspondingly smaller role.
Aspden, Andrew, Day, M., Bell, J.
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Characterization of low Lewis number flames [PDF]
Proceedings of the Combustion Institute, 2011 Abstract A recent numerical study of turbulence–flame interactions in lean premixed hydrogen, where the Lewis number was approximately 0.36, observed that flames at different equivalence ratios presented significantly different behavior despite having the same Karlovitz and Damkohler numbers.
Aspden, Andrew, Day, M., Bell, J.
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Strained Premixed Laminar Flames with Nonunity Lewis Numbers [PDF]
Combustion Science and Technology, 1983 The method of activation energy asymptotics is used to study the effects of Lewis numbers different from unity on nonadiabatic flamelets in counterflowing streams of reactants and products. A sequence of analyses parallels those reported earlier for such flamelets having Lewis number unity.
Libby, Paul A. +2 more
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Triple flames in mixing layers with nonunity lewis numbers [PDF]
Symposium (International) on Combustion, 1998 The present paper is devoted to the study of the effects of nonunity Lewis numbers on triple-flame propagation in nonuniform mixtures. For definiteness, the case of a strained reactive mixing layer is considered. The fuel and oxidizer that are fed to the mixing layer are allowed to have different initial temperatures.
Daou, J., Liñán Martínez, Amable
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High Lewis Number Combustion Wavefronts: A Perturbative Melnikov Analysis [PDF]
SIAM Journal on Applied Mathematics, 2007 The wavefronts associated with a one-dimensional combustion model with Arrhenius kinetics and no heat loss are analyzed within the high Lewis number perturbative limit. This situation, in which fuel diffusivity is small in comparison to that of heat, is appropriate for highly dense fluids.
Sanjeeva Balasuriya +3 more
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Selective Chemical Filters for VOF3: Tailoring MgF2 Filter Selectivity through Surface Chemistry
Surfaces, 2023 In order to synthesize chemical filters for the selective removal of volatile fluorides, commercial magnesium fluoride MgF2 with high specific surface area (HSA) was investigated.
Laurent Jouffret +5 more
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On the stability of high Lewis number combustion fronts
Discrete and Continuous Dynamical Systems, 2009 We consider wave fronts that arise in a mathematical model for high Lewis number combustion processes. An efficient method for the proof of the existence and uniqueness of combustion fronts is provided by geometric singular perturbation theory. The fronts supported by the model with very large Lewis numbers are small perturbations of the front ...
Anna Ghazaryan +1 more
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The Behavior of Lewis Number in Finned Tube Cooling Coils under Highly Moist Inlet Air Conditions
International Journal of Technology, 2016 The objective of this research was to study the effects of highly moist inlet air conditions such as temperature, relative humidity, and frontal air velocity on the value of the Lewis number (Le) in the cooling and dehumidifying process of air.
Teerachai Howongsakun +3 more
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Journal of Combustion, 2012 The performance of algebraic flame surface density (FSD) models has been assessed for flames with nonunity Lewis number (Le) in the thin reaction zones regime, using a direct numerical simulation (DNS) database of freely propagating turbulent premixed ...
Mohit Katragadda +2 more
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