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A study of argon thermal plasma flow over a solid sphere

Published online by Cambridge University Press:  26 April 2006

Seungho Paik,
Hoa D. Nguyen and
Jacob N. Chung
Seungho Paik
Affiliation:
Idaho National Engineering Laboratory, EG & G Idaho, Inc., P.O. Box 1625, MS 2404 Idaho Falls, ID 83415, USA
Hoa D. Nguyen
Affiliation:
Idaho National Engineering Laboratory, EG & G Idaho, Inc., P.O. Box 1625, MS 2404 Idaho Falls, ID 83415, USA
Jacob N. Chung
Affiliation:
Department of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USA
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Abstract

The phenomena of momentum and heat transfer associated with an impulsively started spherical particle in a quiescent argon thermal plasma environment is considered. The changing plasma thermodynamics and transport property effects are studied using a Chebyshev-Legendre spectral method. Steady-state solutions for the case of constant sphere surface temperature are obtained and compared with previously published results. Transient solutions with particle internal heat conduction included are also presented. Results indicate that the magnitude of the drag force increases as the plasma free-stream temperature increases, while the Nusselt number decreases with increasing free-stream temperature. Effects due to different initial particle temperatures on the transient Nusselt number and drag coefficient are demonstrated.

Information

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 252 , July 1993, pp. 543 - 564
Copyright
© 1993 Cambridge University Press

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