Results 1 to 10 of about 252,528 (148)
On the mathematical model simplification using constant Lewis number – Impact assessment on heterogeneous char conversion process [PDF]
E3S Web of Conferences, 2021 Reactive systems in a thermochemical conversion domain are modelled considering N-specie, 1-energy and 2-mass conservation equations assuming negligible pressure gradient resulting in N+3 non-linear coupled PDE system with dependency on thermodynamic and
Asheruddin N Mohammed +2 more
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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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Effects of hydrogen addition and turbulence on ignition and meso-scale flames of propane mixtures
Journal of Thermal Science and Technology, 2022 This study has investigated experimentally the effects of hydrogen addition and turbulence on the ignition and the flame-kernel development characteristics in isotropic and homogeneous turbulence for propane mixtures.
Masaya NAKAHARA +4 more
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Heat-mass transfer model and irreversible heat transfer process analysis of high-humidity exhaust
Meitan xuebao, 2023 In engineering, the efficient extraction of low-grade energy from mine exhaust is a key issue. Based on the heat-mass transfer between high-humidity exhaust and low-temperature spray in the heat recovery diffuser tower, a theoretical model of heat-mass ...
Siyu FAN +7 more
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Mathematics, 2023 One of the practical methods for examining the stability and dynamical behaviour of non-linear systems is weakly non-linear stability analysis. Time-varying gravitational acceleration and triple-diffusive convection play a significant role in the ...
Pervinder Singh +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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Experimental Study on Local Flame Properties of Hydrogen Added Hydrocarbon Premixed Turbulent Flames
Journal of Thermal Science and Technology, 2009 This experimental study is performed to investigate directly the local flame properties of turbulent propagating flames at the same weak turbulence condition (u'/SL0=1.4), in order to clarify basically the influence of the addition of hydrogen to ...
Masaya NAKAHARA +2 more
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An Analysis of Local Quantities of Turbulent Premixed Flames Using DNS Databases
Journal of Thermal Science and Technology, 2008 A numerical analysis was performed using DNS (Direct Numerical Simulation) databases of statistically steady and fully developed turbulent premixed flames with different density ratios and with different Lewis numbers.
Kazuya TSUBOI +2 more
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