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Preferential diffusion and concentration modification in sooting counterflow diffusion flames
Symposium (International) on Combustion, 1989An experimental investigation has been conducted on the influence of the mobility of inert additives on soot formation in propane and ethylene counterflow diffusion flames. Inerts used were helium, neon, argon, or krypton, and the results show that while the mobility of the inert has practically no effect when a small amount of inert is added to the ...
R.L. Axelbaum, C.K. Law, W.L. Flower
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Preferential diffusion effects in diffusion flames
2008Numerical computations were made of axisymmetric laminar jet diffusion flames taking into account detailed chemical kinetics and multicomponent diffusion. It was shown that preferential diffusion of heat and species causes significant amount of excess and deficit of enthalpy, and increase and decrease of mole fraction in the flame. These effects result
Toshimi Takagi +2 more
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Personalized recommendation based on preferential bidirectional mass diffusion
Physica A: Statistical Mechanics and its Applications, 2017Abstract Recommendation system provides a promising way to alleviate the dilemma of information overload. In physical dynamics, mass diffusion has been used to design effective recommendation algorithms on bipartite network. However, most of the previous studies focus overwhelmingly on unidirectional mass diffusion from collected objects to ...
Guilin Chen +4 more
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Burke–Schumann Flame with Streamwise and Preferential Diffusion
Combustion Science and Technology, 1984Abstract The classical diffusion flame model of Burke and Schumann is extended to include the effects of both streamwise and preferential diffusion. The study first identifies a Lewis-number-weighted coupling function as the proper one to usc in formulations involving non-unity Lewis numbers. A perturbation technique is then developed for the realistic
S. H. CHUNG, C. K. LAW
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Preferential diffusion effects on the temperature in usual and inverse diffusion flames
Combustion and Flame, 1996Abstract Numerical computations are made of axisymmetric laminar jet diffusion flames taking into account detailed chemical kinetics and multicomponent diffusion. Two types of flames are investigated. The one is a usual flame that is formed around a fuel jet surrounded by an air flow.
Toshimi Takagi +2 more
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Diffusion and Preferential Adsorption of Sol-Gel Glass
Applied Spectroscopy, 1991Samples of porous glass of 38 Å average pore size are prepared with the use of the sol-gel technique. After stabilizing at 800°C, samples are impregnated with various binary mixtures and Raman spectroscopy is used to analyze the composition of the mixtures inside the pores. In order to study the effect of surface interaction on preferential adsorption,
J. Watson, T. W. Zerda
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Preferential Diffusion Effects on NO Formation in Methane/Hydrogen-Air Diffusion Flames
Energy & Fuels, 2007A numerical study in methane/hydrogen diffusion flames has been conducted to clarify the preferential diffusion effects of H 2 and H with detailed chemistry. The composition of fuel is systematically changed from pure methane to pure hydrogen through the molar addition of H 2 to methane.
Jeong Soo Kim +5 more
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Global Reaction Mechanism for Ethylene Flames with Preferential Diffusion
Combustion Science and Technology, 2010Two compact global mechanisms for ethylene (C2H4) diffusion flame combustion have been tailored to include important reaction steps for acetylene and benzene production. One mechanism (G11) contains 11 species with 10 reaction steps including acetylene (C2H2), and the other mechanism (G12) contains 12 species with a total of 11 reactions steps to ...
Terese Løvås +2 more
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Extreme role of preferential diffusion in turbulent flame propagation
Combustion and Flame, 2018Abstract In this paper we demonstrate the essential role of molecular diffusion in the structure and propagation of turbulent flames. We first show that mixtures whose concentrations are near or beyond the conventional flammability limits can be rendered to burn strongly in turbulence, provided the controlling molecular mass diffusivity of the ...
Sheng Yang +4 more
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Temperature and diffusion effects in preferential sputtering of CrSi2
Nuclear Instruments and Methods in Physics Research, 1983Abstract We found a marked variation with temperature of the composition of CrSi 2 under irradiation with 100 keV Xe + ions. At the same time the composition of material sputtered did not change significantly with temperature. Sputtered material was collected from some of the samples on carbon sheets. Both, carbon collectors and irradiated samples,
R. Fernandez, U. Shreter, M.-A. Nicolet
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