Download or read book Numerical Simulation of Combustion in Fire Plumes written by Howard R. Baum and published by . This book was released on 1996 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Overall, within the limitations of an axially-symmetric calculation, the behavior of flame flickering and the time-averaged temperature field were reasonably well predicted.
Download or read book Transport Phenomena in Fires written by Mohammad Faghri and published by WIT Press. This book was released on 2008 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Controlled fires are beneficial for the generation of heat and power while uncontrolled fires, like fire incidents and wildfires, are detrimental and can cause enormous material damage and human suffering. This edited book presents the state-of-the-art of modeling and numerical simulation of the important transport phenomena in fires. It describes how computational procedures can be used in analysis and design of fire protection and fire safety. Computational fluid dynamics, turbulence modeling, combustion, soot formation, thermal radiation modeling are demonstrated and applied to pool fires, flame spread, wildfires, fires in buildings and other examples.
Download or read book Numerical Simulation of the Dynamics of Large Fire Plumes and the Phenomenon of Puffing written by A. F. Ghoniem and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Simulation of Combustion Phenomena written by R. Glowinski and published by Springer. This book was released on 1985 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling and Simulation of Turbulent Combustion written by Santanu De and published by Springer. This book was released on 2017-12-12 with total page 663 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive review of state-of-the-art models for turbulent combustion, with special emphasis on the theory, development and applications of combustion models in practical combustion systems. It simplifies the complex multi-scale and nonlinear interaction between chemistry and turbulence to allow a broader audience to understand the modeling and numerical simulations of turbulent combustion, which remains at the forefront of research due to its industrial relevance. Further, the book provides a holistic view by covering a diverse range of basic and advanced topics—from the fundamentals of turbulence–chemistry interactions, role of high-performance computing in combustion simulations, and optimization and reduction techniques for chemical kinetics, to state-of-the-art modeling strategies for turbulent premixed and nonpremixed combustion and their applications in engineering contexts.
Download or read book Numerical Combustion written by Alain Dervieux and published by . This book was released on 1989 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Simulation of Unconfined Fire Plume written by Tingguang Ma and published by . This book was released on 2001 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Approaches to Combustion Modeling written by Elaine S. Oran and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 1991 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct and Large Eddy Simulation III written by Peter R. Voke and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: The practical importance of turbulence led the U.K. Royal Academy of Engineering to launch an Initiative on Turbulence, the most important outcome of which was the definition and agreement of the 1999 Newton Institute Research Programme on Turbulence. The main aim of the- month programme, held at the institute in Cambridge, was to bring together the mathematics and engineering communities involved in the turbulence area to address the many problems and to map out future strategy. As a part of the Research Programme, a Symposium on Direct and Large-Eddy Simulation was jointly organised with ERCOFfAC through their Large-Eddy Simulation Interest Group and took place in May 1999. Two previous ERCOFf AC Workshops had already taken place on these closely related varieties of turbulence simulation, at The University of Surrey in 1994 and at Universite Joseph Fourier, Grenoble in 1996. The Symposium at Cambridge was therefore the third in the ERCOFTAC series, enhanced by the presence of leading figures in the field from Europe and the USA who were resident at INI for that period of the Research Programme. Professors M. Germano, A. Leonard, J. Jimenez, R. Kerr and S. Sarkar gave the invited lectures, text versions of which will be found in this volume. As occurred at the previous two ERCOFT AC workshops, there were almost one hundred participants mostly from Europe but including some from Japan and the USA, including on this occasion resident scientists of the INI Research Programme.
Download or read book Numerical Simulation of Near Surface Environments and Particulate Clouds Generated by Large Area Files written by S. L. Marcus and published by . This book was released on 1987 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: The near surface environments and lofted particulate clouds produced by large area fires have been simulated with the axisymmetric DICE code. Studies with an inviscid version of the model showed that variations in the assumed area and burning rate of the fire have a strong effect on the maximum inflow winds, temperatures, and plume heights which develop. Using a multiphase version of the model, which predicts concentrations of soot, water vapor, liquid water, and ice, it was found that the particulate clouds generated by large area fires show considerable vertical dispersion, and that latent heat released by condensing water vapor can significantly enhance cloud heights. When the grid is changed from finely zoned to coarsely zoned, the effective mixing of the combustion heating over a greater depth generates cooler maximum temperatures, causing the plume to shift from oscillatory (overshooting) behavior to a steady state regime. When the mixing is explicity accounted for by introducing parameterized turbulence, steady state behavior results for the finely zoned cases as well. Using an extended version of DICE which includes a tangential velocity component, an initial swirl velocity of 10 m/sec at the edge of a 10 km radius fire was found to spin up to swirl velocities in excess of 200 m/sec in the inflow layer near the axis of the fire. Plume heights for this case, which allowed no interaction of swirl with turbulence, were about 3 km lower than a corresponding nonrotating case.
Download or read book Numerical Simulation of Low pressure Explosive Combustion in Compartment Fires written by Zhixin Hu and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the ASME Heat Transfer Division 2000 written by Jong H. Kim and published by . This book was released on 2000 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Densimetric Plumes and Fire Plumes in Ventilated Tunnels written by Lei Jiang and published by . This book was released on 2017 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates experimentally, theoretically and numerically the critical ventilation velocity in longitudinal ventilated tunnels in case of a fire. The critical velocity is defined as the minimum ventilation velocity that confines the front of the backlayer of harmful buoyant gases downwind of the source of emission. The fire is first modeled by a release of light gas in ambient air. In the experiments, the light fluid is an air/helium mixture. A simple mathematical model, based on the classical plume study, is formulated to interpret the variations of the critical velocity as a function of the source conditions (momentum and buoyancy fluxes and geometry). A good agreement is observed between the experimental results and the theoretical predictions for both the momentum-driven and buoyancy-driven releases. In addition, the non-Boussinesq effects, i.e. related to large differences between the densities of the buoyant plume and the ambient fluid, could be suitably modeled. Subsequently, the difference between a buoyant plume and a fire is studied, by combining experiments and numerical simulations. The reason for the appearance of the so-called 'super-critical' velocity, a ventilation velocity that becomes independent of the heat release rate when it becomes large, is discussed. It is shown that small fires can be reliably modeled as buoyant densimetric plumes released at ground level. The dynamics induced by larger fires require instead the modeling of large flames and hence a volumetric source of heat and buoyancy within the tunnel. In the simulation of fires, when the heat release rate is increased, the volume of combustion also increases, but the critical velocity remains nearly constant, which validates the appearance of the 'super-critical' velocity. The effect of tunnel inclination on the critical velocity is then studied. The influence of slope (defined as negative when the entrance of fresh air is at a lower elevation than the source) on the movement of smoke is mainly related to the role of the component of buoyancy along the tunnel axis. A positive slope helps the formation of the backlayer, while a negative slope helps reaching the critical condition. However, this effect depends on the source condition. Our experiments and numerical simulations on densimetric plumes suggest that the dynamical condition at the source affects the critical velocity of a buoyant plume: when the buoyant plume is momentum-driven, the influence of slope is small; when the buoyant plume is buoyancy-driven, the influence of slope is large. This behavior can be well described by a theoretical model based on the previous model of the critical velocity in a horizontal tunnel. These results have been extended to the case of fires by conducting numerical simulations and there is again a good agreement between the observed results and the theoretical model. In particular, the ratio of the critical velocities obtained for an inclined and an horizontal tunnel is independent of the power of the fire. Finally, the effect of vehicular blockage on the critical velocity is studied experimentally and numerically. The vehicles are modeled by blocks of different sizes placed upstream of the buoyancy or fire source. It is shown that only the block close to the source affects the critical velocity, whereas the effect of other blocks of the same size located further upstream is negligible. As the fire-blockage distance becomes larger, the critical velocity changes and becomes close to the value in an empty tunnel. The relative position between the blocks and the fire source has large influence on the critical velocity. When the blocks are placed at the center laterally, the ventilation flow cannot reach the fire plume directly, a larger critical velocity is needed compared with that in a corresponding empty tunnel. [...].
Download or read book Combustion Fundamentals of Fire written by Geoffrey Cox and published by Academic Press. This book was released on 1995-01 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years fire science has made rapid progress due to the increase in research on the subject. This book brings together state-of-the-art contributions on those aspects of fire within the engineering science ofcombustion. Written by leading experts, the book seeks to identify the role of fire in the spectrum of combustion science. Individual chapters address solid phase combustion, turbulent diffusion flames, and thermal plumes. The text then examines the consequences of fire occurring within an enclosure from ignition, through flashover, on to the fully developed phase. Using zonal and CFD methodologies with consideration for fire chemistry, the text also reviews the latest research in the numerical modellingof enclosure fires. This book will interest all those concerned with fire safety. In particular it will be of value for combustion scientists with an interest in fire and fire protection. Key Features * Presents a state-of-the-art treatise on fire science * Consolidates our current understanding of this very complex problem * Provides a solid foundation to a rapidly developing engineering profession * Includes applications of computer simulation to design and fire investigation
Download or read book Numerical Simulation of Combustion Phenomena written by Roland Glowinski and published by . This book was released on 1985 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wildland Fire Dynamics written by Kevin Speer and published by Cambridge University Press. This book was released on 2022-06-30 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: An overview of recent advances in the quantitative modeling of wildland fire based on fluid dynamics, including a discussion of the mathematical and dynamical principles. Providing a state-of-the-art survey, it is a useful reference for scientists, researchers, and graduate students interested in fire behavior from a range of fields.
Download or read book Numerical Simulation of Chemical Reactions in Point source Plumes written by John Peter Meeder and published by . This book was released on 1998 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:
