Abstract
The features of interaction of a spherical metallic particle with a rarefied thermal plasma flow due to the presence o charges-electrons and ions in the gaseous phase-are considered. Analytical expressions describing charge, momentum, and energy exchange between the plasma and the particle für the cases of strong and weak Debye screening are obtained. It is illustrated that the efficiency of particle heating in the plasma considerably grows as compared with a hot molecular gas due to participation of electrons and ions in file transfer processes.
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Abbreviations
- C :
-
heat capacity
- e :
-
electron charge
- E i :
-
ionization energy
- f :
-
velocity distribution function
- F :
-
drag force
- I :
-
flux of number of plasma species
- k B :
-
Boltzmann constant
- Kn:
-
Knudsen number
- l :
-
mean free path m mass
- M :
-
Mach number
- N :
-
number density P pressure
- Q :
-
heat flux
- r :
-
spatial coordinate
- r D :
-
Debye length
- R p :
-
radius of the particle
- s p :
-
particle surface area
- S :
-
speed ratio
- t :
-
time
- T :
-
temperature
- U :
-
interaction energy
- v :
-
plasma species velocity
- V :
-
plasma flow, particle velocity
- x,Y,z :
-
Cartesian coordinate system associated with particle surface
- X P :
-
coordinate of particle in plasma jet
- y f :
-
dimensionless floating potential
- γ :
-
ratio of specific heats
- ν :
-
ionization degree
- θ :
-
vectorial angle
- ζ :
-
impact parameter
- ϱ :
-
density
- φ :
-
potential
- Φ :
-
work function
- Ψ :
-
scattering angle
- a :
-
molecules (atoms)
- e :
-
electrons
- i :
-
ions
- g :
-
plasma (gas)
- h :
-
heavy plasma species (molecules and ions)
- p :
-
metallic particle
- s :
-
surface
- ∞:
-
value in nondisturbed region of plasma far from particle
- +:
-
direction from particle
- −:
-
direction to particle
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Uglov, A.A., Gnedovets, A.G. Effect of particle charging on momentum and heat transfer from rarefied plasma flow. Plasma Chem Plasma Process 11, 251–267 (1991). https://doi.org/10.1007/BF01447245
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DOI: https://doi.org/10.1007/BF01447245