The Drag Force Acting on a Small Evaporating Particle Exposed to a High-Temperature Diatomic Gas Flow
✍ Scribed by Xi Chen
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 254 KB
- Volume
- 200
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
present analysis. A similar study but for the particle thermo-Kinetic-theory analytical results are presented concerning the phoresis was conducted in a previous paper (6). As meneffect of intense evaporation on the drag force acting on a spherical tioned before ( 6), the research results presented here will particle exposed to a high-temperature diatomic gas for the case be useful for many applications such as the synthesis of fine of a free-molecule regime. Molecule dissociation and atom recompowders by injecting solute droplets as the raw materials bination are included in the analysis. It has been shown that evapointo a high-temperature gas reactor and the electron depletion ration may substantially enhance the drag force acting on a partitechnique by injecting liquid droplets into the plasma sheath cle, especially for the case of the particle materials with low-evapoin spacecraft communication studies.
ration latent heat and small molecular mass at high gas
The study of the drag force acting on a particle (or droptemperatures. The values of the recombination fraction of atoms at the particle surface and of the fraction of the specularly reflected let) with intense evaporation represents a combined problem molecules or atoms significantly affect the drag force acting on a of mass, heat, and momentum transfer as for the case of particle. Neglecting gas dissociation may appreciably overestimate thermophoresis study. Here the term ''intense evaporation'' the drag force acting on a nonevaporating or evaporating particle means that the evaporation of the particle is controlled by at high gas temperatures. ᭧ 1998 Academic Press the heat transfer from the high-temperature gas to the parti-Key Words: drag force; evaporating particle; kinetic-theory analcle and the surface temperature of the evaporating particle ysis; high temperature gas.