Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Печать: 1093-3611
ISSN Онлайн: 1940-4360

Выпуски:
Том 24, 2020 Том 23, 2019 Том 22, 2018 Том 21, 2017 Том 20, 2016 Том 19, 2015 Том 18, 2014 Том 17, 2013 Том 16, 2012 Том 15, 2011 Том 14, 2010 Том 13, 2009 Том 12, 2008 Том 11, 2007 Том 10, 2006 Том 9, 2005 Том 8, 2004 Том 7, 2003 Том 6, 2002 Том 5, 2001 Том 4, 2000 Том 3, 1999 Том 2, 1998 Том 1, 1997

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v4.i1.20
22 pages

THERMODYNAMIC AND TRANSPORT PROPERTIES OF THERMAL PLASMAS

Pierre Fauchais
Laboratoire Sciences des Procedes Ceramiques et de Traitements de Surface UMR CNRS 6638 University of Limoges 123 avenue Albert Thomas, 87060 LIMOGES - France
M. F. Elchinger
SPCTS University of Limoges, 123 av. A. Thomas, 87060 Limoges cedex, France
Jacque Aubreton
SPCTS University of Limoges, 123 av. A. Thomas, 87060 Limoges cedex, France

Краткое описание

The requirements for thermodynamic and transport properties are illustrated through an example: a d.c. spraying plasma torch used either for spraying or thermal plasma CVD. First the problems involved in calculating thermodynamic properties of complex molecules existing at temperatures below 3000 K are recalled and a few examples of thermodynamic properties are presented. The way to introduce non equilibrium by a multi-temperature "pseudo-equilibrium" is then discussed and the results compared with kinetic or pseudo-kinetic calculations. The calculation of transport properties, except for diffusion, can be performed easily in multiple temperatures "pseudo-equilibrium" provided the interaction potentials are known, which at the moment is limited to a few simple gas mixtures. Examples of the influence of multiple temperatures and the poorly known interaction potentials are presented. The difficulties involved in calculating diffusion at equilibrium are recalled, and the interest of such calculations is highlighted with the example of an Ar-H2 d.c. arc. The calculations of a plasma flow illustrate the necessity of using simple mixing rules but also their limitations. Finally, the relative importance of the uncertainties in transport and thermodynamic properties is shown compared to the influence of turbulence or the changing of the calculation from 2 to 3 dimensions.


Articles with similar content:

RADIATIVE AND TRANSPORT PROPERTIES IN Ar-H2-Cu MIXTURES AT ATMOSPHERIC PRESSURE
Progress in Plasma Processing of Materials, 2001, Vol.0, 2001, issue
Y. Cressault, Alain Gleizes
RADIATIVE AND TRANSPORT PROPERTIES IN AR-H2-CU MIXTURES AT ATMOSPHERIC PRESSURE
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.15, 2011, issue 1
Y. Cressault, Alain Gleizes
NORMAL SHOCK HEATED FLOW PARAMETERS FOR EQUILIBRIUM AIR OVER A HYPERSONIC PARABOLIC TRAJECTORY
Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2019), Vol.0, 2019, issue
Deepak Kumar Agarwal, Sharmistha Choubey, Kartikey Sharma
KINETICS OF CONDENSATION FROM A MIXTURE OF GASES
International Heat Transfer Conference 11, Vol.17, 1998, issue
Valeri V. Levdansky, Oleg G. Martynenko
Simulation of Nonstationary Thermal Processes in Superconducting Systems
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 1986, issue
A. V. Philippov, I. G. Merinov, V. I. Subbotin, A. V. Gavrilin, V. S. Kharitonov, V. I. Deev, B. A. Vakhneneko, V. V. Shako