naa a22 4500 510766900 CHVBK 20180411083159.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s12043-012-0491-2 doi (NATIONALLICENCE)springer-10.1007/s12043-012-0491-2 Arc plasma devices: Evolving mechanical design from numerical simulation [Elektronische Daten] [S GHORUI, A DAS] Wide ranges of technological applications involve arc plasma devices as the primary plasma source for processing work. Recent findings exhibit the existence of appreciable thermal non-equilibrium in these so-called thermal plasma devices. Commercially available magnetohydrodynamic codes are not capable of handling such systems due to unavailability of non-equilibrium thermodynamic and transport property data and self-consistent models. A recipe for obtaining mechanical design of arc plasma devices from numerical simulation incorporating two-temperature thermal non-equilibrium model is presented in this article with reference to the plasma of the mixture of molecular gases like nitrogen and oxygen. Such systems are technologically important as they correspond to the plasma devices operating with air, oxygen plasma torches in cutting industries and plasma devices using nitrogen as shielding gas. Temperature field, associated fluid dynamics and electrical characteristics of a plasma torch are computed in a systematic manner to evaluate the performance of a conceived design using a two-fluid CFD model coupled with a two-temperature thermodynamic and transport property code. Important effects of different nozzle designs and plasma gases obtained from the formalism are discussed. Non-equilibrium thermodynamic properties are computed using modified two-temperature Saha equations and transport properties are computed using standard Chapman-Enskog approach. Indian Academy of Sciences, 2013 Arcs nationallicence air plasma nationallicence plasma torch nationallicence non-equilibrium plasma nationallicence plasma simulation nationallicence torch design nationallicence GHORUI S. Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Trombay, 400 085, Mumbai, India aut DAS A. Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Trombay, 400 085, Mumbai, India aut Pramana Springer-Verlag 80/4(2013-04-01), 685-699 0304-4289 80:4<685 2013 80 12043 https://doi.org/10.1007/s12043-012-0491-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12043-012-0491-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- GHORUI S. Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Trombay, 400 085, Mumbai, India aut NATIONALLICENCE 700 1- DAS A. Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Trombay, 400 085, Mumbai, India aut NATIONALLICENCE 773 0- Pramana Springer-Verlag 80/4(2013-04-01), 685-699 0304-4289 80:4<685 2013 80 12043 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer