Download or read book Analysis and Development of Algorithms for Fully Compositional Thermal and Reactive Numerical Simulation of In situ Combustion at Laboratory Scale written by Matthias Alexis Cremon and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, we study the numerical simulation of computational, thermal and reactive flow in porous media. We built, tested and verified a robust numerical framework to obtain solutions of the coupled and non-linear system of partial differential equations. We illustrate that some of the models typically used in isothermal simulations need to be adapted in the presence of thermal effects. Our cases are largely impacted by the evaporation and condensation of components, and we demonstrate that lumping has a strong influence on the accuracy of the solutions. Aggressive lumping of the heavy components results in premature evaporation and an overestimation of the recovery. We designed a new multi-level delumping method suitable to thermal recovery processes and were able to lower the error made in the phase behavior calculations by an order of magnitude. Finally, we propose a new family of multi-stage preconditioners dedicated to thermal and reactive cases, reducing the number of iterations of a GMRES linear solver by 40-85% compared to the usual CPR method. The new preconditioners exhibit little to no sensitivity to the thermal regime (advection or diffusion dominated).
Download or read book Numerical Simulation of in Situ Combustion microform written by Roy Siqueira and published by National Library of Canada. This book was released on 1985 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct Incorporation of Laboratory Data for Simulation of In situ Combustion Dynamics written by Olufolake Ogunbanwo and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In-situ combustion, ISC, is a thermal enhanced oil recovery technique often numerically modeled using a set of non-linear transport equations, combined with Arrhenius rate laws to describe the reaction kinetics of crude oil oxidation. The Arrhenius rate reaction equations are laborious to construct, dependent on the researcher, and computationally expensive to integrate. The greater the number of reactions defined, the larger the number of parameters that need to be specified. As a result, the ISC numerical model for any given oil is a non-unique complex model that can be highly multivariate. This work presents a nonArrhenius technique for predicting the reaction dynamics during ISC independent of the heating rate. Vital laboratory data from ramped temperature oxidation kinetic cell experiments, depicting the combustion chemistry, are directly used to account for the appearance and disappearance of reacting species. The extent of the global reaction taking place is mapped uniquely to an overall reaction rate at any given temperature. This mapping is tabulated and graphed based on the isoconversional principle for each reacting species. The tables are then incorporated into the mass and energy conservation system of equations for predicting the underlying combustion kinetics. The robustness of this method is compared to lab scale results from a conventional thermal simulator using Arrhenius based reaction rate laws and laboratory experiments. This kinetics prediction method proposed for ISC processes is beneficial because it predicts the rate at which oil and oxygen are consumed and the production of the carbon oxides in a timely and expedient manner. The turnaround time from experimental data acquisition to predictive model development is reduced. The number of free parameters required to match experimental results is also minimal because the tabulated kinetics data are unique and directly enforced.
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: Interest in numerical combustion is growing among applied mathematicians, physicists, chemists, engine manufacturers and many industrialists. This proceedings volume contains nine invited lectures and twenty seven contributions carefully selected by the editors. The major themes are numerical simulation of transsonic and supersonic combustion phenomena, the study of supersonic reacting mixing layers, and turbulent combustion. Emphasis is laid on hyperbolic models and on numerical simulations of hydrocarbon planes with a complete set of chemical reactions carried out in two-dimensional geometries as well as on complex reactive flow simulations.
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 Compositional Simulation of the In Situ Combustion Process written by Mohd. Nawi Derahman and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Simulation of in Situ Combustion in a Two dimensional System written by James Thurman Smith and published by . This book was released on with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Role of Kinetics in the Numerical Simulation of In situ Combustion written by Douglas W. Bennion and published by . This book was released on 1982 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulent Combustion Modeling written by Tarek Echekki and published by Springer Science & Business Media. This book was released on 2010-12-25 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulent combustion sits at the interface of two important nonlinear, multiscale phenomena: chemistry and turbulence. Its study is extremely timely in view of the need to develop new combustion technologies in order to address challenges associated with climate change, energy source uncertainty, and air pollution. Despite the fact that modeling of turbulent combustion is a subject that has been researched for a number of years, its complexity implies that key issues are still eluding, and a theoretical description that is accurate enough to make turbulent combustion models rigorous and quantitative for industrial use is still lacking. In this book, prominent experts review most of the available approaches in modeling turbulent combustion, with particular focus on the exploding increase in computational resources that has allowed the simulation of increasingly detailed phenomena. The relevant algorithms are presented, the theoretical methods are explained, and various application examples are given. The book is intended for a relatively broad audience, including seasoned researchers and graduate students in engineering, applied mathematics and computational science, engine designers and computational fluid dynamics (CFD) practitioners, scientists at funding agencies, and anyone wishing to understand the state-of-the-art and the future directions of this scientifically challenging and practically important field.
Download or read book A Two dimensional Compositional Simulation of the in Situ Combustion Process written by M. N. Derahman and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mathematical Modeling in Combustion and Related Topics written by Claude-Michel Brauner and published by Springer Science & Business Media. This book was released on 1988-03-31 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains invited lectures and contributed papers presented at the NATO Advanced Research Workshop on Mathematical Modeling in Combustion and related topics, held in. Lyon (France), April 27 - 30, 1987. This conference was planned to fit in with the two-month visit of Professor G.S.S. Ludford to the Ecole Centrale de Lyon. He kindly agreed to chair the Scientific and Organizing Committee and actively helped to initiate the meeting. His death in December 1986 is an enormous loss to the scientific community in general, and in particular, to the people involved in the present enterprise. The subject of mathematical modeling in combustion is too large for a single conference, and the selection of topics re flects both areas of recent research activity and areas of in terest to Professor G.S.S. Ludford, to whose memory the Advanced Workshop and this present volume are dedicated. The meeting was divided into seven specialized sessions detonation theory, mathematical analysis, numerical treatment of combustion problems, flame theory, experimental and industrial aspects, complex chemistry, and turbulent combustion. It brought together researchers and engineers from University and Industry (see below the closing remarks of the workshop by Prof. N. Peters). The articles in this volume have been judged and accepted on their scientific quality, and language corrections may have been sacrificed in order to allow quick dissemination of knowledge to prevail.
Download or read book EXPERIMENTAL INVESTIGATION AND HIGH RESOLUTION SIMULATOR OF IN SITU COMBUSTION PROCESSES written by and published by . This book was released on 2004 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurate simulation of in-situ combustion processes is computationally very challenging because the spatial and temporal scales over which the combustion process takes place are very small. In this third quarterly report of our DoE funded research, we continue the discussion of the design of a new simulation tool based on an efficient Cartesian Adaptive Mesh Refinement technique that allows much higher grid densities to be used near typical fronts than current simulators. Also, we show preliminary results for the one-dimensional in-situ combustion simulator, which will serve as the foundation for the development of a three-dimensional simulator that can handle realistic permeability heterogeneity. On the experimental side, the combustion kinetic apparatus and the combustion tube are now fully operational, and a series of successful combustion tube runs were performed that clearly showed additives allow combustion of poorly reactive oils. We have also started scanning electron microscope (SEM) analysis to investigate the sand-clay-salt mixtures that are used for combustion in which we focus on grain sizes, shapes, orientations, characteristic inter-structures, and element analysis.
Download or read book Numerical Simulations of Turbulent Combustion written by Andrei Lipatnikov and published by Mdpi AG. This book was released on 2020-07 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulent burning of gaseous fuels is widely used for energy conversion in stationary power generation, e.g., gas turbines, land transportation, piston engines, and aviation, and aero-engine afterburners. Nevertheless, our fundamental understanding of turbulent combustion is still limited, because it is a highly non-linear and multiscale process that involves various local phenomena and thousands (e.g., for gasoline-air mixtures) of chemical reactions between hundreds of species, including several reactions that control emissions from flames. Therefore, there is a strong need for elaborating high fidelity, advanced numerical models, and methods that will catch the governing physical mechanisms of flame-turbulence interaction and, consequently, will make turbulent combustion computations an efficient predictive tool for applied research and, in particular, for development of a new generation of ultra-clean and highly efficient internal combustion engines that will allow society to properly respond to current environmental and efficiency challenges. Accordingly, papers published in this Special Issue (i) contribute to our fundamental understanding of flame-turbulence interaction by analyzing results of unsteady multi-dimensional numerical simulations and (ii) develop and validate high-fidelity models and efficient numerical methods for computational fluid Dynamics research into turbulent combustion in laboratory burners and engines.
Download or read book Numerical Modeling of Thermal Recovery Processes written by Mohamed Yousef Soliman and published by . This book was released on 1979 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In Depth Study of in Situ Combustion Kinetics and Coupling to Flow written by Kuy Hun Koh Yoo and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis furthers understanding of three topics that are critical to In Situ Combustion (ISC) processes: crude oil kinetics, the tools used to model accurately and practically complex kinetic behavior and how oil kinetics couples with flow, especifically in systems with complex permeability distributions. On kinetics, we study the effects of pressure on crude oil kinetics for a large range of pressures and heating rates (1.5, 2.0, 5.0, 7.5, 8.0, 10.0, 15.0, 20.0, and 30.0 °C/min. Our results show that the activation energy of global reactions is not affected by changes in both partial pressure (21, 42, 50, 84, 209, and 250 psi) and absolute pressure (100-2000 psi) with values ranging 50 and 60 kJ/mol for the LTO regime and 90-100 kJ/mol for the HTO regime. Three different crude oils were tested. For one of the crude oils, we observe an increasing trend in oxygen consumption as absolute pressure is increased up to a critical pressure (~500 psi), after which it remains constant. This is associated to light component evaporation at low pressures, decreasing the amount of oil available for fuel generation. Total oxygen consumption starts to decrease again at very large pressures (> 1500 psi) and we associate it to water phase behavior at these conditions. We then propose a workflow and construct the corresponding tools to match Arrhenius-based reaction models for lab-scale numerical simulation models. The workflow is validated by matching multiple reaction models to experimental data obtained for a large range of heating rates (1.5-30 °C/min). On flow, we study instabilities that have been observed during combustion tube experiments by analyzing simple analogous problems and performing perturbation analysis from which we derive a new stability parameter. Finally, we propose and test a new experimental approach to observe directly how oil kinetics evolve under flow conditions by using thermal imaging and combining images with ramped temperature oxidation (RTO) experimental data. Results show that the reaction zone in lab conditions is in the order of centimeters. Reaction zone thicknesses range between 10-30 cm for the LTO zone and 10-50 cm for the HTO zone. Furthermore, we show how the new approach can help investigate complex systems and behaviors, such as oscillations, that could not otherwise be studied with conventional experiments.
Download or read book Numerical Combustion written by Alain Dervieux and published by Springer. This book was released on 1989-01-01 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest in numerical combustion is growing among applied mathematicians, physicists, chemists, engine manufacturers and many industrialists. This proceedings volume contains nine invited lectures and twenty seven contributions carefully selected by the editors. The major themes are numerical simulation of transsonic and supersonic combustion phenomena, the study of supersonic reacting mixing layers, and turbulent combustion. Emphasis is laid on hyperbolic models and on numerical simulations of hydrocarbon planes with a complete set of chemical reactions carried out in two-dimensional geometries as well as on complex reactive flow simulations.
