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

Publication de 4  numéros par an

ISSN Imprimer: 1093-3611

ISSN En ligne: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

Indexed in

THERMODYNAMIC AND TRANSPORT PROPERTIES OF THERMAL PLASMAS

Volume 4, Numéro 1, 2000, 22 pages
DOI: 10.1615/HighTempMatProc.v4.i1.20
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RÉSUMÉ

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.

CITÉ PAR
  1. Fauchais P, Understanding plasma spraying, Journal of Physics D: Applied Physics, 37, 9, 2004. Crossref

  2. Fauchais Pierre, Vardelle Armelle, Thermal Plasmas Surface Treatment, in Materials Surface Processing by Directed Energy Techniques, 2006. Crossref

  3. Fauchais P., Montavon G., Plasma Spraying: From Plasma Generation to Coating Structure, in Advances in Heat Transfer Volume 40, 40, 2007. Crossref

  4. Rat V., André P., Aubreton J., Elchinger M. F., Fauchais P., Lefort A., Transport properties in a two-temperature plasma: Theory and application, Physical Review E, 64, 2, 2001. Crossref

  5. Boulos Maher I., Jurewicz Jerzy W., Fauchais Pierre L., Pfender Emil, Plasma in the Chemical Process Industry, in Handbook of Thermal Plasmas, 2023. Crossref

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