The role of radiation in modelling of argon inductively coupled plasmas at atmospheric pressure

Modelling of inductively coupled plasmas at atmospheric pressure has been developed for years, integrating fluid dynamics, electromagnetism and heat transfer. In this work, special attention has been devoted to radiation transfer. Two radiation models have been implemented: the net emission coeffici...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2008-08, Vol.41 (16), p.165204-165204 (9)
Main Authors: Lacombe, J G, Delannoy, Y, Trassy, C
Format: Article
Language:English
Subjects:
Discharges for spectral sources (including inductively coupled plasmas)
Electric discharges
Exact sciences and technology
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
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Summary:Modelling of inductively coupled plasmas at atmospheric pressure has been developed for years, integrating fluid dynamics, electromagnetism and heat transfer. In this work, special attention has been devoted to radiation transfer. Two radiation models have been implemented: the net emission coefficient and the P1 model. These models have been run with different torch geometries and input powers. The parametric study shows that they are very sensitive to parameters such as the thermal and electrical conductivity of the gas and input power. The temperature distributions have been compared with the measurements available in the literature. The spectral P1 model is more accurate at the expense of the computing time. The radiative heat losses are below 5% in small torches such as those used in spectrochemical analysis, but can exceed 40% in large torches (40 mm diameter or more), becoming the main cooling mechanism.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/41/16/165204