Author: Ingrid J. Wysong
Publisher:
ISBN:
Category : Diatomic molecules
Languages : en
Pages : 68
Book Description
Direct Simulation Monte Carlo Modeling for Non-equilibrium Flowfield Applications
Author: Ingrid J. Wysong
Publisher:
ISBN:
Category : Diatomic molecules
Languages : en
Pages : 68
Book Description
Publisher:
ISBN:
Category : Diatomic molecules
Languages : en
Pages : 68
Book Description
Direct Simulation Monte Carlo Modeling for Non-Equilibrium Flowfield Applications
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Questions important to modeling of nonequilibrium gas flows are examined. Testing and validation of Direct Simulation Monte Carlo (DSMC) codes have been performed. Several models for vibrational relaxation and chemical reaction of diatomic molecules have been implemented and studied parametrically, utilizing measurement and advanced calculations from the literature as benchmarks. DSMC results have been compared to rotational temperature measurements of nitrogen in finite background jet expansion flows. The influence of the rotational relaxation model, the influx boundary condition, and the outer boundary treatment on the simulation have been investigated.
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Questions important to modeling of nonequilibrium gas flows are examined. Testing and validation of Direct Simulation Monte Carlo (DSMC) codes have been performed. Several models for vibrational relaxation and chemical reaction of diatomic molecules have been implemented and studied parametrically, utilizing measurement and advanced calculations from the literature as benchmarks. DSMC results have been compared to rotational temperature measurements of nitrogen in finite background jet expansion flows. The influence of the rotational relaxation model, the influx boundary condition, and the outer boundary treatment on the simulation have been investigated.
Direct Modeling For Computational Fluid Dynamics: Construction And Application Of Unified Gas-kinetic Schemes
Author: Kun Xu
Publisher: World Scientific
ISBN: 9814623733
Category : Technology & Engineering
Languages : en
Pages : 335
Book Description
Computational fluid dynamics (CFD) studies the flow motion in a discretized space. Its basic scale resolved is the mesh size and time step. The CFD algorithm can be constructed through a direct modeling of flow motion in such a space. This book presents the principle of direct modeling for the CFD algorithm development, and the construction unified gas-kinetic scheme (UGKS). The UGKS accurately captures the gas evolution from rarefied to continuum flows. Numerically it provides a continuous spectrum of governing equation in the whole flow regimes.
Publisher: World Scientific
ISBN: 9814623733
Category : Technology & Engineering
Languages : en
Pages : 335
Book Description
Computational fluid dynamics (CFD) studies the flow motion in a discretized space. Its basic scale resolved is the mesh size and time step. The CFD algorithm can be constructed through a direct modeling of flow motion in such a space. This book presents the principle of direct modeling for the CFD algorithm development, and the construction unified gas-kinetic scheme (UGKS). The UGKS accurately captures the gas evolution from rarefied to continuum flows. Numerically it provides a continuous spectrum of governing equation in the whole flow regimes.
Direct Simulation Monte Carlo of Non-equilibrium Rarefield Flows
Author: Nuno Franco Rodrigues Alves
Publisher:
ISBN:
Category :
Languages : en
Pages : 304
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 304
Book Description
Application of a Direct Simulation Monte Carlo Method to Rarefied Gas Flow Problems
Nonequilibrium Processes in the Planetary and Cometary Atmospheres: Theory and Applications
Author: Mikhail Ya. Marov
Publisher: Springer Science & Business Media
ISBN: 9781402003783
Category : Science
Languages : en
Pages : 308
Book Description
This book reviews the approach to the kinetic simulation of nonequilib rium processes in the planetary atmospheres which the authors developed and dealt with since the 1970s. The results of this study, which are focused on the nonequilibrium collisional processes in the atmospheres of planets and comets, are thoroughly reviewed and discussed. Many specific problems of atmospheric modeling, involving numerical evaluation of aeronomic pro cesses, are addressed and compared with the available experimental data. The kinetic approach proved to be especially effective to model the in teraction of the incident shortwave solar radiation with the rarefied gas of planetary upper atmospheres. It involves various processes of photolysis, en ergetic electron impacts, and accompanying numerous chemical reactions, as well as processes occurring in the intermediate ("transition") zones of planetary and cometary gas envelopes. The underlying mathematical treat ment is based on the stochastic approach for the solution of the Boltzmann type equation and implies the development of the efficient algorithms for its computer simulation. Some results of this study were previously summa rized in the monograph issued in Russian (Marov et al. , 1990) and later in the review paper published in Space Science Reviews (Marov et al. , 1996). The basic principles of stochastic simulation were first developed in the field of rarefied gas dynamics and were successfully applied to the solution of some engineering problems of aerodynamics and heat transfer.
Publisher: Springer Science & Business Media
ISBN: 9781402003783
Category : Science
Languages : en
Pages : 308
Book Description
This book reviews the approach to the kinetic simulation of nonequilib rium processes in the planetary atmospheres which the authors developed and dealt with since the 1970s. The results of this study, which are focused on the nonequilibrium collisional processes in the atmospheres of planets and comets, are thoroughly reviewed and discussed. Many specific problems of atmospheric modeling, involving numerical evaluation of aeronomic pro cesses, are addressed and compared with the available experimental data. The kinetic approach proved to be especially effective to model the in teraction of the incident shortwave solar radiation with the rarefied gas of planetary upper atmospheres. It involves various processes of photolysis, en ergetic electron impacts, and accompanying numerous chemical reactions, as well as processes occurring in the intermediate ("transition") zones of planetary and cometary gas envelopes. The underlying mathematical treat ment is based on the stochastic approach for the solution of the Boltzmann type equation and implies the development of the efficient algorithms for its computer simulation. Some results of this study were previously summa rized in the monograph issued in Russian (Marov et al. , 1990) and later in the review paper published in Space Science Reviews (Marov et al. , 1996). The basic principles of stochastic simulation were first developed in the field of rarefied gas dynamics and were successfully applied to the solution of some engineering problems of aerodynamics and heat transfer.
Scientific and Technical Aerospace Reports
Monte Carlo Methods in Mechanics of Fluid and Gas
Author: Oleg Mikha?lovich Belot?serkovski?
Publisher: World Scientific
ISBN: 9814282359
Category : Science
Languages : en
Pages : 281
Book Description
This book is devoted to analysis of Monte Carlo methods developed in rarefied gas dynamics. Presented is the short history of the development of such methods, described are their main properties, their advantages and deficiencies. It is shown that the contemporary stage in the progress of computational methods cannot be regarded without a complex approach to the preparation of algorithms taking into account all the peculiarities of the problem under consideration, that is, of the physical nature of a process, the mathematical model and the theoretical aspects of computational mathematics and stochastic processes. Thoroughly investigated is the possibility of application of Monte Carlo methods in some kindred areas of science which are non-traditional for the use of statistical modeling (continuous media, turbulence). Considered are the possible directions of development of statistical modeling.
Publisher: World Scientific
ISBN: 9814282359
Category : Science
Languages : en
Pages : 281
Book Description
This book is devoted to analysis of Monte Carlo methods developed in rarefied gas dynamics. Presented is the short history of the development of such methods, described are their main properties, their advantages and deficiencies. It is shown that the contemporary stage in the progress of computational methods cannot be regarded without a complex approach to the preparation of algorithms taking into account all the peculiarities of the problem under consideration, that is, of the physical nature of a process, the mathematical model and the theoretical aspects of computational mathematics and stochastic processes. Thoroughly investigated is the possibility of application of Monte Carlo methods in some kindred areas of science which are non-traditional for the use of statistical modeling (continuous media, turbulence). Considered are the possible directions of development of statistical modeling.
Nonequilibrium Gas Dynamics and Molecular Simulation
Author: Iain D. Boyd
Publisher: Cambridge University Press
ISBN: 1107073448
Category : Science
Languages : en
Pages : 383
Book Description
7.1 Introduction -- 7.2 Rotational Energy Exchange Models -- 7.2.1 Constant Collision Number -- 7.2.2 The Parker Model -- 7.2.3 Variable Probability Exchange Model of Boyd -- 7.2.4 Nonequilibrium Direction Dependent Model -- 7.2.5 Model Results -- 7.3 Vibrational Energy Exchange Models -- 7.3.1 Constant Collision Number -- 7.3.2 The Millikan-White Model -- 7.3.3 Quantized Treatment for Vibration -- 7.3.4 Model Results -- 7.4 Dissociation Chemical Reactions -- 7.4.1 Total Collision Energy Model -- 7.4.2 Redistribution of Energy Following a Dissociation Reaction -- 7.4.3 Vibrationally Favored Dissociation Model -- 7.5 General Chemical Reactions -- 7.5.1 Reaction Rates and Equilibrium Constant -- 7.5.2 Backward Reaction Rates in DSMC -- 7.5.3 Three-Body Recombination Reactions -- 7.5.4 Post-Reaction Energy Redistribution and General Implementation -- 7.5.5 DSMC Solutions for Reacting Flows -- 7.6 Summary -- Appendix A: Generating Particle Properties -- Appendix B: Collisional Quantities -- Appendix C: Determining Post-Collision Velocities -- Appendix D: Macroscopic Properties -- Appendix E: Common Integrals -- References -- Index
Publisher: Cambridge University Press
ISBN: 1107073448
Category : Science
Languages : en
Pages : 383
Book Description
7.1 Introduction -- 7.2 Rotational Energy Exchange Models -- 7.2.1 Constant Collision Number -- 7.2.2 The Parker Model -- 7.2.3 Variable Probability Exchange Model of Boyd -- 7.2.4 Nonequilibrium Direction Dependent Model -- 7.2.5 Model Results -- 7.3 Vibrational Energy Exchange Models -- 7.3.1 Constant Collision Number -- 7.3.2 The Millikan-White Model -- 7.3.3 Quantized Treatment for Vibration -- 7.3.4 Model Results -- 7.4 Dissociation Chemical Reactions -- 7.4.1 Total Collision Energy Model -- 7.4.2 Redistribution of Energy Following a Dissociation Reaction -- 7.4.3 Vibrationally Favored Dissociation Model -- 7.5 General Chemical Reactions -- 7.5.1 Reaction Rates and Equilibrium Constant -- 7.5.2 Backward Reaction Rates in DSMC -- 7.5.3 Three-Body Recombination Reactions -- 7.5.4 Post-Reaction Energy Redistribution and General Implementation -- 7.5.5 DSMC Solutions for Reacting Flows -- 7.6 Summary -- Appendix A: Generating Particle Properties -- Appendix B: Collisional Quantities -- Appendix C: Determining Post-Collision Velocities -- Appendix D: Macroscopic Properties -- Appendix E: Common Integrals -- References -- Index
The CRC Handbook of Mechanical Engineering
Author: D. Yogi Goswami
Publisher: CRC Press
ISBN: 1420041584
Category : Technology & Engineering
Languages : en
Pages : 2690
Book Description
The second edition of this standard-setting handbook provides and all-encompassing reference for the practicing engineer in industry, government, and academia, with relevant background and up-to-date information on the most important topics of modern mechanical engineering. These topics include modern manufacturing and design, robotics, computer engineering, environmental engineering, economics, patent law, and communication/information systems. The final chapter and appendix provide information regarding physical properties and mathematical and computational methods. New topics include nanotechnology, MEMS, electronic packaging, global climate change, electric and hybrid vehicles, and bioengineering.
Publisher: CRC Press
ISBN: 1420041584
Category : Technology & Engineering
Languages : en
Pages : 2690
Book Description
The second edition of this standard-setting handbook provides and all-encompassing reference for the practicing engineer in industry, government, and academia, with relevant background and up-to-date information on the most important topics of modern mechanical engineering. These topics include modern manufacturing and design, robotics, computer engineering, environmental engineering, economics, patent law, and communication/information systems. The final chapter and appendix provide information regarding physical properties and mathematical and computational methods. New topics include nanotechnology, MEMS, electronic packaging, global climate change, electric and hybrid vehicles, and bioengineering.