Oran, Elaine S.
Overview
Works:  63 works in 119 publications in 2 languages and 1,800 library holdings 

Roles:  Author, Editor, Other 
Classifications:  QA911, 530.15 
Publication Timeline
.
Most widely held works by
Elaine S Oran
Numerical simulation of reactive flow by
Elaine S Oran(
Book
)
27 editions published between 1987 and 2005 in English and Russian and held by 600 WorldCat member libraries worldwide
"This book takes account of the explosive growth in computer technology and the greatly increased capacity for solving complex reactiveflow problems that have occurred since the first edition of Numerical Simulation of Reactive Flow was published in 1987. It presents algorithms useful for reactiveflow simulations, describes tradeoffs involved in their use, and gives guidance for building and using models of complex reactive flows. The text covers both new topics and significant changes in the treatment of radiation transport, coupling, grids and numerical representations, and turbulence. Chapters are arranged in three broad sections: an introductory short course on modeling and numerical simulation; advanced topics in numerical simulation of reactiveflow processes; and, finally, simulations of complex reactive flows." "This new edition is an indispensable guide to how to construct, use, and interpret numerical simulations of reactive flows. It will be welcomed by advanced undergraduate and graduate students, as well as a wide range of researchers and practitioners in engineering, physics, and chemistry."Jacket
27 editions published between 1987 and 2005 in English and Russian and held by 600 WorldCat member libraries worldwide
"This book takes account of the explosive growth in computer technology and the greatly increased capacity for solving complex reactiveflow problems that have occurred since the first edition of Numerical Simulation of Reactive Flow was published in 1987. It presents algorithms useful for reactiveflow simulations, describes tradeoffs involved in their use, and gives guidance for building and using models of complex reactive flows. The text covers both new topics and significant changes in the treatment of radiation transport, coupling, grids and numerical representations, and turbulence. Chapters are arranged in three broad sections: an introductory short course on modeling and numerical simulation; advanced topics in numerical simulation of reactiveflow processes; and, finally, simulations of complex reactive flows." "This new edition is an indispensable guide to how to construct, use, and interpret numerical simulations of reactive flows. It will be welcomed by advanced undergraduate and graduate students, as well as a wide range of researchers and practitioners in engineering, physics, and chemistry."Jacket
Numerical approaches to combustion modeling(
Book
)
15 editions published in 1991 in English and held by 212 WorldCat member libraries worldwide
15 editions published in 1991 in English and held by 212 WorldCat member libraries worldwide
Numerical simulations of fuel droplet flows using a lagrangian triangular mesh : [final report] by
M. J Fritts(
Book
)
1 edition published in 1983 in English and held by 98 WorldCat member libraries worldwide
This report describes work done to convert the incompressible, Lagrangian, triangular grid code, SPLISH, to the study of flows in and about fuel droplets. This has involved developing, testing and incorporating new algorithms for surface tension and viscosity. The major features of the Lagrangian method and the new algorithms are described. Benchmarks of the new algorithms are given. Several calculations are presented for kerosene droplets in air. Finally, extensions which make the code compressible and three dimensional are discussed
1 edition published in 1983 in English and held by 98 WorldCat member libraries worldwide
This report describes work done to convert the incompressible, Lagrangian, triangular grid code, SPLISH, to the study of flows in and about fuel droplets. This has involved developing, testing and incorporating new algorithms for surface tension and viscosity. The major features of the Lagrangian method and the new algorithms are described. Benchmarks of the new algorithms are given. Several calculations are presented for kerosene droplets in air. Finally, extensions which make the code compressible and three dimensional are discussed
The interactions of a flame and its selfinduced boundary layer by
James Ott(
Book
)
1 edition published in 1999 in English and held by 85 WorldCat member libraries worldwide
1 edition published in 1999 in English and held by 85 WorldCat member libraries worldwide
Deflagration to detonation transition in thermonuclear supernovae by
A. M Khokhlov(
Book
)
1 edition published in 1996 in English and held by 81 WorldCat member libraries worldwide
We derive the criteria for deflagration to detonation transition (DDT) in a Type Ia supernova. The theory is based on the two major assumptions: (i) detonation is triggered via the Zeldovich gradient mechanism inside a region of mixed fuel and products, (ji) the mixed region is produced by a turbulent mixing of fuel and products either inside an active deflagration front or during the global expansion and subsequent contraction of an exploding white dwarf. We determine the critical size of the mixed region required to initiate a detonation in a degenerate carbon oxygen mixture. This critical length is much larger than the width of the reaction front of a ChapmanJouguet detonation. However, at densities greater than = 5 x 10(exp6) g/cc, it is much smaller than the size of a white dwarf. We derive the critical turbulent intensity required to create the mixed region inside an active deflagration front in which a detonation can form. We conclude that the density rho sub sigma at which a detonation can form in a carbonoxygen white dwarf is low, approximately less than 2 to 5 x 109exp6) g/cc, but greater than 5 x 10(exp6) g/cc
1 edition published in 1996 in English and held by 81 WorldCat member libraries worldwide
We derive the criteria for deflagration to detonation transition (DDT) in a Type Ia supernova. The theory is based on the two major assumptions: (i) detonation is triggered via the Zeldovich gradient mechanism inside a region of mixed fuel and products, (ji) the mixed region is produced by a turbulent mixing of fuel and products either inside an active deflagration front or during the global expansion and subsequent contraction of an exploding white dwarf. We determine the critical size of the mixed region required to initiate a detonation in a degenerate carbon oxygen mixture. This critical length is much larger than the width of the reaction front of a ChapmanJouguet detonation. However, at densities greater than = 5 x 10(exp6) g/cc, it is much smaller than the size of a white dwarf. We derive the critical turbulent intensity required to create the mixed region inside an active deflagration front in which a detonation can form. We conclude that the density rho sub sigma at which a detonation can form in a carbonoxygen white dwarf is low, approximately less than 2 to 5 x 109exp6) g/cc, but greater than 5 x 10(exp6) g/cc
A theory of DDT in unconfined flames by Alexei M Khokhlov(
Book
)
2 editions published in 1996 in English and held by 80 WorldCat member libraries worldwide
This paper outlines a theoretical approach for predicting the onset of detonation in unconfined turbulent flames. Two basic assumptions are made (1) the gradient mechanism is the inherent mechanism that leads to DDT in unconfined conditions, and (2) the sole mechanism for preparing the gradient in induction time is by turbulent mixing and local flame quenching. The criterion for DDT is derived in terms of the onedimensional detonation wave thickness, the laminar flame speed, and the laminar flame thickness in the reactive gas. This approach gives a lowerbound criterion for DDT for conditions where shock preheating, wall effects, and interactions with obstacles are absent. Regions in parameter space where unconfined DDT can and cannot occur are determined
2 editions published in 1996 in English and held by 80 WorldCat member libraries worldwide
This paper outlines a theoretical approach for predicting the onset of detonation in unconfined turbulent flames. Two basic assumptions are made (1) the gradient mechanism is the inherent mechanism that leads to DDT in unconfined conditions, and (2) the sole mechanism for preparing the gradient in induction time is by turbulent mixing and local flame quenching. The criterion for DDT is derived in terms of the onedimensional detonation wave thickness, the laminar flame speed, and the laminar flame thickness in the reactive gas. This approach gives a lowerbound criterion for DDT for conditions where shock preheating, wall effects, and interactions with obstacles are absent. Regions in parameter space where unconfined DDT can and cannot occur are determined
Timedependent computational studies of premixed flames in microgravity by G Kailasanath(
Book
)
1 edition published in 1993 in English and held by 76 WorldCat member libraries worldwide
1 edition published in 1993 in English and held by 76 WorldCat member libraries worldwide
Timedependent computational studies of flames in microgravity by
Elaine S Oran(
Book
)
1 edition published in 1989 in English and held by 74 WorldCat member libraries worldwide
1 edition published in 1989 in English and held by 74 WorldCat member libraries worldwide
Detailed modelling of combustion systems by
Elaine S Oran(
Book
)
3 editions published between 1980 and 1981 in English and held by 7 WorldCat member libraries worldwide
The purpose of this paper is to acquaint the reader with some of the basic principles of detailed modelling as applied to combustion systems. Detailed modelling is also known as numerical simulation. It can be used to describe the chemical and physical evolution of a complex reactive flow system by solving numerically the governing timedependent conservation equations for mass, momentum and energy. Solving these equations requires input data such as the species present, the chemical reactions that can occur, transport coefficients for viscosity, thermal conductivity, molecular diffusion, and thermal diffusion, the equation of state for the various materials present, and a set of boundary, source and initial conditions. Given this information, the equations contain in principle all the information we might want from the largest macroscopic space scales down to the point where the fluid approximation itself breaks down. Flame, detonation, turbulence phenomena, and all multidimensional effects are included in the solutions of these equations. An important goal of detailed modelling is to develop a computational model with a wellunderstood range of validity. This model can then be used in a predictive role to evaluate the feasibility and validity of new concepts. It can also be used to interpret experimental measurements, to extend our knowledge to new parameter regimes, and perhaps as an engineering design tool. Throughout these various applications, the model may serve as an excellent way to test our understanding of the interactions of the individual physical processes which control the behavior of a reactive flow system
3 editions published between 1980 and 1981 in English and held by 7 WorldCat member libraries worldwide
The purpose of this paper is to acquaint the reader with some of the basic principles of detailed modelling as applied to combustion systems. Detailed modelling is also known as numerical simulation. It can be used to describe the chemical and physical evolution of a complex reactive flow system by solving numerically the governing timedependent conservation equations for mass, momentum and energy. Solving these equations requires input data such as the species present, the chemical reactions that can occur, transport coefficients for viscosity, thermal conductivity, molecular diffusion, and thermal diffusion, the equation of state for the various materials present, and a set of boundary, source and initial conditions. Given this information, the equations contain in principle all the information we might want from the largest macroscopic space scales down to the point where the fluid approximation itself breaks down. Flame, detonation, turbulence phenomena, and all multidimensional effects are included in the solutions of these equations. An important goal of detailed modelling is to develop a computational model with a wellunderstood range of validity. This model can then be used in a predictive role to evaluate the feasibility and validity of new concepts. It can also be used to interpret experimental measurements, to extend our knowledge to new parameter regimes, and perhaps as an engineering design tool. Throughout these various applications, the model may serve as an excellent way to test our understanding of the interactions of the individual physical processes which control the behavior of a reactive flow system
Numerical simulation of detonation transfer between gaseous explosive layers by
David A Jones(
Book
)
2 editions published in 1989 in English and held by 6 WorldCat member libraries worldwide
The development of a two dimensional computer code to simulate detonation transfer between explosive layers is described. The code is based on previous models developed to study the structure of layered detonations and the details of detonation transmission from one medium to another. The code has been configured to simulate experiments conducted at the University of Michigan on the lateral transfer of detonation and shock phenomena between different gaseous layers. Preliminary calculations with the code show that the computations produce many of the structures seen in the Michigan experiments and also provide detailed descriptions of the detonation transmission and evolving structure. (jhd)
2 editions published in 1989 in English and held by 6 WorldCat member libraries worldwide
The development of a two dimensional computer code to simulate detonation transfer between explosive layers is described. The code is based on previous models developed to study the structure of layered detonations and the details of detonation transmission from one medium to another. The code has been configured to simulate experiments conducted at the University of Michigan on the lateral transfer of detonation and shock phenomena between different gaseous layers. Preliminary calculations with the code show that the computations produce many of the structures seen in the Michigan experiments and also provide detailed descriptions of the detonation transmission and evolving structure. (jhd)
A onedimensional fluxcorrected transport code for detonation calculations by
David A Jones(
Book
)
2 editions published between 1990 and 1991 in English and held by 6 WorldCat member libraries worldwide
The development of a onedimensional FluxCorrected Transport code to model detonation in a homogeneous medium is described. The material flow is modelled using the Euler equations, and the chemical kinetics by a twostep induction parameter model which uses a quasisteady induction time and first order Arrhenius kinetics. Two different modes off initiation are compared. Conditions necessary for a selfsustaining detonation are described and illustrated. A detailed comparison is made between the variable profiles calculated by the code and those calculated analytically using the simple ChapmanJouguet theory and selfsimilar analysis, and the overall agreement is excellent. The effect of the computational cell size on these solutions is also considered
2 editions published between 1990 and 1991 in English and held by 6 WorldCat member libraries worldwide
The development of a onedimensional FluxCorrected Transport code to model detonation in a homogeneous medium is described. The material flow is modelled using the Euler equations, and the chemical kinetics by a twostep induction parameter model which uses a quasisteady induction time and first order Arrhenius kinetics. Two different modes off initiation are compared. Conditions necessary for a selfsustaining detonation are described and illustrated. A detailed comparison is made between the variable profiles calculated by the code and those calculated analytically using the simple ChapmanJouguet theory and selfsimilar analysis, and the overall agreement is excellent. The effect of the computational cell size on these solutions is also considered
Simulations of Gas Phase Detonations: Introduction of an Induction Parameter Model(
Book
)
3 editions published in 1980 in English and held by 2 WorldCat member libraries worldwide
Detailed numerical simulations of supersonic reactive flow and gas phase detonation problems are very expensive due to their computer time and memory requirements. The bulk of this cost is in integrating the ordinary differential equations describing chemical reactions. A global induction parameter model has thus been developed which describes the chemical induction time of a mixture and allows for release of energy over a finite time period. The specific gases for which it has been calibrated are stoichiometric mixtures of hydrogen and methane in air. The relatively inexpensive induction parameter model is then used in timedependent one and twodimensional simulations of supersonic reactive flows. (Author)
3 editions published in 1980 in English and held by 2 WorldCat member libraries worldwide
Detailed numerical simulations of supersonic reactive flow and gas phase detonation problems are very expensive due to their computer time and memory requirements. The bulk of this cost is in integrating the ordinary differential equations describing chemical reactions. A global induction parameter model has thus been developed which describes the chemical induction time of a mixture and allows for release of energy over a finite time period. The specific gases for which it has been calibrated are stoichiometric mixtures of hydrogen and methane in air. The relatively inexpensive induction parameter model is then used in timedependent one and twodimensional simulations of supersonic reactive flows. (Author)
Reactive Shock Phenomena in Condensed Materials: Formulation of the Problem and Method of Solution by R Guirguis(
Book
)
2 editions published in 1983 in English and held by 2 WorldCat member libraries worldwide
A reactive shock simulation model used to study the formation and propagation of shocks and detonations in condensed phase materials is described. Two test cases are given: (1) laser initiation of a shock wave propagating through water, and (2) the development of a detonation front from a hot spot in liquid nitromethne
2 editions published in 1983 in English and held by 2 WorldCat member libraries worldwide
A reactive shock simulation model used to study the formation and propagation of shocks and detonations in condensed phase materials is described. Two test cases are given: (1) laser initiation of a shock wave propagating through water, and (2) the development of a detonation front from a hot spot in liquid nitromethne
Numerical Approaches to Combustion Modeling by
Elaine S Oran(
Book
)
1 edition published in 2000 in English and held by 2 WorldCat member libraries worldwide
1 edition published in 2000 in English and held by 2 WorldCat member libraries worldwide
A theoretical study of a spin hamiltonian with biquadratic pair interactions by
Elaine S Oran(
Book
)
1 edition published in 1972 in English and held by 2 WorldCat member libraries worldwide
1 edition published in 1972 in English and held by 2 WorldCat member libraries worldwide
Timedependent simulations of laminar flames in hydrogenair mixtures by K Kailasanath(
Book
)
2 editions published in 1987 in English and held by 2 WorldCat member libraries worldwide
We have examined two fundamental problems in premixed laminar flames using a detailed, timedependent, onedimensional model. In the first problem, we examined the relative importance of thermal conduction, thermal diffusion, and ordinary diffusion in determining the burning velocities of laminar hydrogenair flames. Three cases were examined in detail: a fuellean mixture, a stoichiometric mixture, and a fuelrich mixture. Our general conclusion from this study is that both ordinary diffusion and thermal conduction are necessary to quantitatively describe flame propagation in a hydrogenair mixture. Their relative importance, however, varies as we go from fuellean to fuelrich hydrogenair mixtures. In the second problem, we considered the behavior of flames in fuel rich hydrogenair mixtures near the experimentally observed flammability limit. The effects of gravity, stretch and external heat losses were eliminated in the numerical simulations. The results suggest wider flammability limits than those observed experimentally under normal gravity conditions. The simulations also indicate that there may be a limit due to chemical kinetic considerations alone
2 editions published in 1987 in English and held by 2 WorldCat member libraries worldwide
We have examined two fundamental problems in premixed laminar flames using a detailed, timedependent, onedimensional model. In the first problem, we examined the relative importance of thermal conduction, thermal diffusion, and ordinary diffusion in determining the burning velocities of laminar hydrogenair flames. Three cases were examined in detail: a fuellean mixture, a stoichiometric mixture, and a fuelrich mixture. Our general conclusion from this study is that both ordinary diffusion and thermal conduction are necessary to quantitatively describe flame propagation in a hydrogenair mixture. Their relative importance, however, varies as we go from fuellean to fuelrich hydrogenair mixtures. In the second problem, we considered the behavior of flames in fuel rich hydrogenair mixtures near the experimentally observed flammability limit. The effects of gravity, stretch and external heat losses were eliminated in the numerical simulations. The results suggest wider flammability limits than those observed experimentally under normal gravity conditions. The simulations also indicate that there may be a limit due to chemical kinetic considerations alone
A onedimensional timedependent model for flame initiation, propagation and quenching by K Kailasanath(
Book
)
2 editions published in 1982 in English and held by 2 WorldCat member libraries worldwide
This report describes a onedimensional, timedependent, Lagrangian numerical model developed to study the initiation, propagation and quenching of laminar flames. A number of new approaches and algorithms as well as input parameters used in the model are discussed. Calculations of initiation and minimum ignition energies in hydrogenoxygennitrogen mixtures are presented along with calculations of the burning velocity of hydrogen in air. (Author)
2 editions published in 1982 in English and held by 2 WorldCat member libraries worldwide
This report describes a onedimensional, timedependent, Lagrangian numerical model developed to study the initiation, propagation and quenching of laminar flames. A number of new approaches and algorithms as well as input parameters used in the model are discussed. Calculations of initiation and minimum ignition energies in hydrogenoxygennitrogen mixtures are presented along with calculations of the burning velocity of hydrogen in air. (Author)
Approaches to Resolving and Tracking Interfaces and Discontinuties by K. J Laskey(
Book
)
2 editions published in 1987 in English and held by 2 WorldCat member libraries worldwide
A review is presented of methods of modeling interfaces in numerical simulations. Interface capturing methods, in which the finest scales of the interface are resolved, and interface tracking approaches methods, in which the interface is treated as a discontinuity are discussed. Interface tracking approaches include movinggrid methods, surface tracking methods, volume tracking methods, and gradient methods. Keywords: Interface tracking; Reactive flows
2 editions published in 1987 in English and held by 2 WorldCat member libraries worldwide
A review is presented of methods of modeling interfaces in numerical simulations. Interface capturing methods, in which the finest scales of the interface are resolved, and interface tracking approaches methods, in which the interface is treated as a discontinuity are discussed. Interface tracking approaches include movinggrid methods, surface tracking methods, volume tracking methods, and gradient methods. Keywords: Interface tracking; Reactive flows
Dynamics of an unsteady diffusion flame : effects of heat release and gravity by Janet L Ellzey(
Book
)
2 editions published in 1990 in English and held by 1 WorldCat member library worldwide
This report presents timedependent axisymmetric numerical simulations of an unsteady diffusion flame formed between a jet and a coflowing air stream. The computations include the effects of convection, molecular diffusion, thermal conduction, viscosity, gravitational forces, and chemical reactions with energy release. Previous work has shown that viscous effects are important in these flames and, therefore, all of the viscous terms in the compressible NavierStokes equations are included. In addition, the resolution is increased so that the large, vortical structures in the coflowing gas are resolved and the boundary conditions are improved so that the velocity field near the jet is more realistic. Computations with and without chemical reactions and heat release, and with and without gravity, are compared. Gravitational effects are insignificant in the nonreacting jet but in the reacting jet gravity produced the relatively lowfrequency instabilities typically associated with flame flicker. KelvinHelmholtz instabilities develop in the region between the highvelocity and lowvelocity fluid when there are no chemical reactions, but heat release dampens these instabilities to produce a mixing region which is almost steady in time
2 editions published in 1990 in English and held by 1 WorldCat member library worldwide
This report presents timedependent axisymmetric numerical simulations of an unsteady diffusion flame formed between a jet and a coflowing air stream. The computations include the effects of convection, molecular diffusion, thermal conduction, viscosity, gravitational forces, and chemical reactions with energy release. Previous work has shown that viscous effects are important in these flames and, therefore, all of the viscous terms in the compressible NavierStokes equations are included. In addition, the resolution is increased so that the large, vortical structures in the coflowing gas are resolved and the boundary conditions are improved so that the velocity field near the jet is more realistic. Computations with and without chemical reactions and heat release, and with and without gravity, are compared. Gravitational effects are insignificant in the nonreacting jet but in the reacting jet gravity produced the relatively lowfrequency instabilities typically associated with flame flicker. KelvinHelmholtz instabilities develop in the region between the highvelocity and lowvelocity fluid when there are no chemical reactions, but heat release dampens these instabilities to produce a mixing region which is almost steady in time
Numerical Simulation of Reactive Flow (2nd Edition) by
Elaine S Oran(
)
1 edition published in 2009 in English and held by 0 WorldCat member libraries worldwide
1 edition published in 2009 in English and held by 0 WorldCat member libraries worldwide
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Related Identities
 Boris, Jay P. Other Author Editor
 United States National Aeronautics and Space Administration
 Naval Research Laboratory (U.S.)
 Wheeler, J. Craig
 Fritts, M. J. (Martin J.) 1943 Author
 Laboratory for Computational Physics (Naval Research Laboratory)
 Fyfe, D. E.
 Lewis Research Center
 NASA Glenn Research Center
 Ott, James D. Author
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Associated Subjects
Chemical kineticsMathematical models Combustion Combustion, Theory of CombustionComputer simulation CombustionEffect of reduced gravity on CombustionResearch Computer simulation Degeneration Detonation wavesComputer simulation Electronhole droplets ExplosionsComputer simulation ExplosionsMathematical models Flame FlameMathematical models Fluid dynamicsMathematical models Gas dynamicsMathematical models Gravity Lagrangian points Laminar flow Mathematical models NavierStokes equations Shock waves Supernovae Transport theoryMathematical models Turbulence