The thermophoretic velocity of a small particle suspended in a plasma
Author: Chen, X.
Source: Journal of Physics D: Applied Physics, Volume 32, Number 3, 1999 , pp. 283-290(8)
Publisher: IOP Publishing
Abstract:Analytical results concerning the thermophoretic velocity of a spherical particle suspended in a plasma for the extreme case of the free-molecule regime and a thin plasma sheath are presented. Several different cases are considered in this study, including non-metallic or metallic particles and non-evaporating or evaporating particles. It has been shown that the thermophoretic velocity increases with increasing temperature gradient or heat flux within the bulk plasma and decreases with increasing gas pressure, but is independent of the particle radius. The thermophoretic velocity of a metallic non-evaporating particle is only a little less than that of a non-metallic one, whereas the thermophoretic velocity of a metallic evaporating particle may be three times as great as that of a non-metallic one at high plasma temperatures.
Document Type: Miscellaneous
Publication date: 1999