Contents: Description of accurate boundary conditions for the simulation of reactive flows. Parallel direct numerical simulation of turbulent reactive flow. Flame-wall interaction and heat flux modelling in turbulent channel flow. A numerical study of laminar flame wall interaction with detailed chemistry: wall temperature effects. Modeling and simulation of turbulent flame kernel evolution. Experimental and theoretical analysis of flame surface density modelling for premixed turbulent combustion. Gradient and counter-gradient transport in turbulent premixed flames. Direct numerical simulation of turbulent flames with complex chemical kinetics. Effects of curvature and unsteadiness in diffusion flames. Implications for turbulent diffusion combustion. Numerical simulations of autoignition in turbulent mixing flows. Stabilization processes of diffusion flames. References.
Introducing numerical techniques for combustion, this textbook describes both laminar and turbulent flames, addresses the problem of flame-wall interaction, and presents a series of theoretical tools used to study the coupling phenomena between combustion and acoustics. The second edition incorporates recent advances in unsteady simulation methods,
This volume gives an overview of the state-of-the-art with respect to the development of all types of parallel computers and their application to a wide range of problem areas. The international conference on parallel computing ParCo97 (Parallel Computing 97) was held in Bonn, Germany from 19 to 22 September 1997. The first conference in this biannual series was held in 1983 in Berlin. Further conferences were held in Leiden (The Netherlands), London (UK), Grenoble (France) and Gent (Belgium). From the outset the aim with the ParCo (Parallel Computing) conferences was to promote the application of parallel computers to solve real life problems. In the case of ParCo97 a new milestone was reached in that more than half of the papers and posters presented were concerned with application aspects. This fact reflects the coming of age of parallel computing. Some 200 papers were submitted to the Program Committee by authors from all over the world. The final programme consisted of four invited papers, 71 contributed scientific/industrial papers and 45 posters. In addition a panel discussion on Parallel Computing and the Evolution of Cyberspace was held. During and after the conference all final contributions were refereed. Only those papers and posters accepted during this final screening process are included in this volume. The practical emphasis of the conference was accentuated by an industrial exhibition where companies demonstrated the newest developments in parallel processing equipment and software. Speakers from participating companies presented papers in industrial sessions in which new developments in parallel computing were reported.
This volume summarizes the state of the art in supercomputing, with special emphasis on the industrial relevance of the presented results and methods. The book showcases an innovative usage of state-of-the-art modeling, novel numerical algorithms and the use of leading-edge high-performance computing systems in a GRID-like environment.
In this fifth volume of the authoritative series, the simulation of forest fires, flames, and hydrodynamics is presented in the first three articles. The next two deal with quantum simulations, in particular for two dimensions (quantum Hall effect and monolayers). Biology is connected with the last two articles: we learn from biological evolution to complement computer hardware and software with evolware, or we simulate immunology.
An overview of recent developments in high performance computing and simulation, with special emphasis on the industrial relevance of the presented results and methods. The book showcases an innovative combination of the state-of-the-art modeling, novel numerical algorithms and the use of leading-edge high-performance computing systems.
Ce document présente les résultats d'une étude numérique et théorique des flammes prémélangées. Les sujets abordés sont l'allumage des flammes et l'interaction entre front de flamme et turbulence homogène isotrope dans des configurations bidimensionnelles. Un des objectifs poursuivis était d'envisager la faisabilité d'une simulation directe complète d'un écoulement réactif turbulent avec chimie et modèles de transport complets. De façon générale, on constate que cet objectif est aujourd'hui réalisable et on présente ici un certain nombre d'applications. Un algorithme de simulation directe (DNS) a été développé dans le cadre de ce travail pour aborder ces problèmes. L'algorithme, initialement développé pour traiter des schémas cinétiques simplifiés est ensuite étendu aux schémas cinétiques plus détaillés avec des propriétés de transport réalistes (avec l'utilisation de CHEMKIN et TRANSPORT). Cet algorithme a permis tout d'abord d'étudier l'allumage de flammes prémélangées avec un schéma cinétique simple. Nous nous sommes intéressés au mécanisme qui contrôle l'allumage dans des écoulements turbulents. Dans une première approche, nous avons étudié l'allumage par déposition d'énergie dans des écoulements a flux massique imposé en configuration bidimensionnelle. Les délais et les temps minimaux d'allumage sont déterminés en fonction de la puissance de chauffage et du flux. Les rayons critiques des noyaux de flamme sont aussi examinés. Un modèle simple est enfin présenté pour représenter ces résultats. Dans une seconde étude nous avons considéré l'interaction entre front de flamme et turbulence homogène isotrope dans une configuration bidimensionnelle. Cette étude est réalisée pour des flammes hydrogène-air représentées par un schéma cinétique a 9 espèces et 19 réactions. Une flamme plane, stationnaire, laminaire, non-étirée, adiabatique est superposée a un champ de vitesse déterminé sur la base d'un spectre d'énergie du type Von Karmann-Pao. L'observation de l'évolution du front de flamme a permis d'établir une description qualitative ainsi que les propriétés statistiques de ce type de flamme.
This volume gathers the contributions of six world experts to a course on combustion modelling. Therefore, a pedagogical effort has been made in writing up these texts, which cover state of the art advances in most aspects of combustion science. The book is aimed at students, researches and engineers, as was the course.
Mathematical Modelling of Gas-Phase Complex Reaction Systems: Pyrolysis and Combustion, Volume 45, gives an overview of the different steps involved in the development and application of detailed kinetic mechanisms, mainly relating to pyrolysis and combustion processes. The book is divided into two parts that cover the chemistry and kinetic models and then the numerical and statistical methods. It offers a comprehensive coverage of the theory and tools needed, along with the steps necessary for practical and industrial applications. Details thermochemical properties and "ab initio" calculations of elementary reaction rates Details kinetic mechanisms of pyrolysis and combustion processes Explains experimental data for improving reaction models and for kinetic mechanisms assessment Describes surrogate fuels and molecular reconstruction of hydrocarbon liquid mixtures Describes pollutant formation in combustion systems Solves and validates the kinetic mechanisms using numerical and statistical methods Outlines optimal design of industrial burners and optimization and dynamic control of pyrolysis furnaces Outlines large eddy simulation of turbulent reacting flows
