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Author: Wenxian Fan
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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CE TRAVAIL EST CONSACRE A LA MODELISATION DES JETS DE PLASMA A BASSE PRESSION ET A HAUTE TEMPERATURE. CES JETS SE TROUVANT EN EQUILIBRE OU EN DESEQUILIBRES THERMIQUE ET CHIMIQUE, SONT ETUDIES AU LABORATOIRE D'AEROTHERMIQUE DE MEUDON DANS LE CADRE DE SIMULATION DES CONDITIONS DE RENTREES D'UN ENGIN DANS LA HAUTE ATMOSPHERE TERRESTRE. LA COMPOSITION D'UN PLASMA D'AZOTE EN DESEQUILIBRE THERMIQUE ET CELLE D'UN PLASMA D'AZOTE-METHANE (ATMOSPHERE DE SATELLITE TITAN) SONT CALCULEES DANS LES DIFFERENTES CONDITIONS DE PRESSION ET DE TEMPERATURE EN UTILISANT RESPECTIVEMENT LA METHODE DE SAHA MODIFIEE ET CELLE DE BRINKLEY. CERTAINES PROPRIETES THERMIQUES SONT CALCULEES EN UTILISANT LA FONCTION DE PARTITION DES ESPECES D'APRES LES CONSTANTES DES STRUCTURES DES MOLECULES ET DES ATOMES. LA THEORIE CINETIQUE DES GAZ EST CHOISIE POUR DETERMINER LES PROPRIETES DE TRANSPORT D'UN PLASMA D'AZOTE EN DESEQUILIBRES THERMIQUE ET CHIMIQUE DANS DIFFERENTES CONDITIONS. CETTE DETERMINATION EST NECESSAIRE POUR DETERMINER LE COMPORTEMENT DE L'ECOULEMENT D'UN GAZ IONISE DANS LE BUT DE RESOUDRE LES DIFFERENTES EQUATIONS DE CONSERVATION. UN MODELE ANALYTIQUE D'APPROCHE, BASE SUR LA THEORIE DE MAGNETO-DYNAMIQUE, EST ETABLI EN TENANT COMPTE DES EFFETS DE DESEQUILIBRES THERMIQUE ET CHIMIQUE POUR LES JETS DE PLASMAS A BASSE PRESSION ET HAUTE TEMPERATURE. CE MODELE PRESENTE LA PREMIERE ETAPE DE LA MODELISATION ET SERA UTILISE POUR SIMULER LES JETS DE PLASMAS EN DESEQUILIBRE
Author: Wenxian Fan
Publisher:
ISBN:
Category :
Languages : fr
Pages :
Get Book Here
Book Description
CE TRAVAIL EST CONSACRE A LA MODELISATION DES JETS DE PLASMA A BASSE PRESSION ET A HAUTE TEMPERATURE. CES JETS SE TROUVANT EN EQUILIBRE OU EN DESEQUILIBRES THERMIQUE ET CHIMIQUE, SONT ETUDIES AU LABORATOIRE D'AEROTHERMIQUE DE MEUDON DANS LE CADRE DE SIMULATION DES CONDITIONS DE RENTREES D'UN ENGIN DANS LA HAUTE ATMOSPHERE TERRESTRE. LA COMPOSITION D'UN PLASMA D'AZOTE EN DESEQUILIBRE THERMIQUE ET CELLE D'UN PLASMA D'AZOTE-METHANE (ATMOSPHERE DE SATELLITE TITAN) SONT CALCULEES DANS LES DIFFERENTES CONDITIONS DE PRESSION ET DE TEMPERATURE EN UTILISANT RESPECTIVEMENT LA METHODE DE SAHA MODIFIEE ET CELLE DE BRINKLEY. CERTAINES PROPRIETES THERMIQUES SONT CALCULEES EN UTILISANT LA FONCTION DE PARTITION DES ESPECES D'APRES LES CONSTANTES DES STRUCTURES DES MOLECULES ET DES ATOMES. LA THEORIE CINETIQUE DES GAZ EST CHOISIE POUR DETERMINER LES PROPRIETES DE TRANSPORT D'UN PLASMA D'AZOTE EN DESEQUILIBRES THERMIQUE ET CHIMIQUE DANS DIFFERENTES CONDITIONS. CETTE DETERMINATION EST NECESSAIRE POUR DETERMINER LE COMPORTEMENT DE L'ECOULEMENT D'UN GAZ IONISE DANS LE BUT DE RESOUDRE LES DIFFERENTES EQUATIONS DE CONSERVATION. UN MODELE ANALYTIQUE D'APPROCHE, BASE SUR LA THEORIE DE MAGNETO-DYNAMIQUE, EST ETABLI EN TENANT COMPTE DES EFFETS DE DESEQUILIBRES THERMIQUE ET CHIMIQUE POUR LES JETS DE PLASMAS A BASSE PRESSION ET HAUTE TEMPERATURE. CE MODELE PRESENTE LA PREMIERE ETAPE DE LA MODELISATION ET SERA UTILISE POUR SIMULER LES JETS DE PLASMAS EN DESEQUILIBRE
Author:
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Category : Fluid dynamics
Languages : en
Pages : 384
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Author:
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ISBN:
Category : Physics
Languages : en
Pages : 722
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Author: Carlos Matos Ferreira
Publisher:
ISBN:
Category : Atomic structure
Languages : en
Pages : 420
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Author: G. A. Bird
Publisher:
ISBN: 9781492112907
Category : Monte Carlo method
Languages : en
Pages : 300
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Book Description
Direct Simulation Monte Carlo is a well-established method for the computer simulation of a gas flow at the molecular level. While there is a limit to the size of the flow-field with respect to the molecular mean free path, personal computers now allow solutions well into the continuum flow regime. The method can be applied to basic problems in gas dynamics and practical applications range from microelectromechanics systems (MEMS) to astrophysical flows. DSMC calculations have assisted in the design of vacuum systems, including those for semiconductor manufacture, and of many space vehicles and missions. The method was introduced by the author fifty years ago and it has been the subject of two monographs that have been published by Oxford University Press. It is now twenty years since the second of these was written and, since that time, most DSMC procedures have been superseded or significantly modified. In addition, visual interactive DSMC application programs have been developed that have proved to be readily applicable by non-specialists to a wide variety of practical problems. The computational variables are set automatically within the code and the programs report whether or not the criteria for a good calculation have been met. This book is concerned with the theory behind the current DSMC molecular models and procedures, with their integration into general purpose programs, and with the validation and demonstration of these programs. The DSMC and associated programs, including all source codes, can be freely downloaded through links that are provided in the book. The main accompanying program is simply called the "DSMC program" and, in future versions of the book, it will be applicable to homogeneous (or zero-dimensional) flows through to three-dimensional flow. All DSMC simulations are time-accurate unsteady calculations, but the flow may become steady at large times. The current version of the DSMC code is applicable only to zero and one-dimensional flows and the older DS2V code is employed for the two-dimensional validation and demonstration cases. It is because of this temporary use of the older and well-proven program that the DS2V source code is made freely available for the first time. Most of the homogeneous flow cases are validation studies, but include internal mode relaxation studies and spontaneous and forced ignition leading to combustion in an oxygen-hydrogen mixture. The one-dimensional cases include the structure of a re-entry shock wave that takes into account electronic excitation as well as dissociation, recombination and exchange reactions. They also include a spherically imploding shock wave and a spherical blast wave. The two-dimensional and axially-symmetric demonstration cases range from a typical MEMS flow to aspects of the flow around rotating planets. Intermediate cases include the formation and structure of a combustion wave, a vacuum pump driven by thermal creep, a typical vacuum processing chamber, and the flow around a typical re-entry vehicle
Author:
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Category : Engineering
Languages : en
Pages : 908
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Author: Greg Sherley
Publisher:
ISBN:
Category : Alien plants
Languages : en
Pages : 208
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Author: Petar Sabev Varbanov
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110630095
Category : Technology & Engineering
Languages : en
Pages : 467
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Book Description
This book provides a thorough guidance on maximizing the performance of utility systems in terms of sustainability. It covers general structure, typical components and efficiency trends, and applications such as top-level analysis for steam pricing and selection of processes for improved heat integration. Examples are provided to illustrate the discussed models and methods to give sufficient learning experience for the reader.
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ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 892
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Author: Paul Acker
Publisher: Psychology Press
ISBN: 9780815331025
Category : Comparative literature
Languages : en
Pages : 158
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Book Description
First Published in 1998. Routledge is an imprint of Taylor & Francis, an informa company.
