Jet Diffusion Flames .a
01 Jan 1999-
About: The article was published on 1999-01-01 and is currently open access. It has received 1 citations till now. The article focuses on the topics: Jet (fluid) & Diffusion flame.
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TL;DR: In this paper, the experimental phase was performed in a laboratory-scale wind tunnel of circular section, under different Reynolds number regimes, considering a continuous release scenario of two tracer gases, namely carbon dioxide and sulphur hexafluoride, at different low release rates.
Abstract: One of the most frequent accident scenario following a loss of containment during HazMat transportation or processing is represented by the dispersion of a dense gas release. Several dispersion models are available to this purpose, more or less rigorously accounting for gravity slumping, air entrainment and possible heat transfer. Under confined geometry, the correct evaluation of possible concentration fluctuations represent an up-to-date research topic, both considering the process sector and a peculiar application represented by operating theaters for surgery. In this last context, the use of heavier than air gas is usually performed for anaesthetic application, while few validation data are available on the dispersion behavior following a fugitive emission and exposure of persons inside the enclosure. On these bases, the experimental phase of this paper was performed in a laboratory-scale wind tunnel of circular section, under different Reynolds number regimes, considering a continuous release scenario of two tracer gases, namely carbon dioxide and sulphur hexafluoride, at different low release rates. A detailed study on concentration fluctuations and time series is presented yielding reliable information on the influence of the different source types and flow rates. Conclusions are drawn on practical feasibility and application of the experimental results, in view of safe optimization of the design and mode of operation of ventilation systems in the considered settings.
Cites background from "Jet Diffusion Flames .a"
...Other authors (Klein and Young, 2011) focused on concentration fluctuations of tracer gases mimicking the contaminants affecting urban air quality....
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References
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Book•
01 Jan 1954
TL;DR: Molecular theory of gases and liquids as mentioned in this paper, molecular theory of gas and liquids, Molecular theory of liquid and gas, molecular theories of gases, and liquid theory of liquids, مرکز
Abstract: Molecular theory of gases and liquids , Molecular theory of gases and liquids , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
11,807 citations
Book•
01 Jan 1961
TL;DR: The second edition of this book has been in short supply for some time and the authors have decided in favor of a reprint of the book rather than an extensive revision at this time.
Abstract: For some time copies of the second edition of this book have been in short supply. In order to meet, the demand for additional copies the authors have decided in favor of a reprint of the book rather than an extensive revision at this time. The justification for this lies in the character of the book. It was conceived as an exposition of basic concepts of gaseous combustion phenomena. Since the publication of the second edition in 1961 the literature on the subject has grown in volume very greatly. However, virtually no new concepts in gaseous combustion have evolved. For this reason we feel that the book, in its present form, continues to serve well the purpose for which it was intended, namely, to provide a systematic presentation of the fundamentals of combustion for scientists and engineers. In addition, we feel that the present edition has not yet outlived its usefulness as a source of data. Furthermore, the utility of certain concepts is only now beginning to be appreciated. This applies in particular to the concept of flame stretch which permits a unified approach to seemingly widely different sets of phenomena, including ignition, flame extinction, stabilization, quenching, flammability limits, and maximum heat release rates.
1,857 citations
TL;DR: In this paper, a simple theoretical formula for the lifto-flight height of non-premixed jet flames based on a boundary layer type of jet theory was proposed, which predicts that liftoff height increases with increasing flow rate for Schmidt numbers in the range Sc > 1 or Sc 1.
257 citations
TL;DR: In this paper, a numerical method for accurate simulation of the inner and outer vortex structures in transitional H 2 /N 2 jet diffusion flames is presented, incorporating buoyancy, a simple one-step chemistry model, coefficients that depend on temperature and species concentration.
Abstract: A numerical method for accurate simulation of the time and spatial characteristics of the inner and outer vortex structures in transitional H 2 /N 2 jet diffusion flames is presented. The direct numerical simulation, incorporating buoyancy, a simple one-step chemistry model, coefficients that depend on temperature and species concentration, is described in detail. The species and energy equations are simplified by introducing two conserved scalars β 1 and β 2 and by assuming that the Lewis number of the flow is equal to unity. An implicit, third-order-accurate, upwind numerical scheme having very low numerical diffusion is used to simulate the inner small-scale structures and the outer large-scale structures simultaneously
186 citations