Study of Evaporation and Condensation Problems by Kinetic Theory
スポンサーリンク
概要
- 論文の詳細を見る
The half-space evaporation and condensation problem is investigated by using the linearized BGK model equation as the governing equation and the finite element method as a tool. Numerical predictions of microscopic and macroscopic temperature and density slip coefficients based upon the finite element mothod are compared with alternative numerical results. Special attributes of the finite element method are discussed in the context of this example problem. Next, by applying the present method to the two-surface evaporation and condensation problem, the density and temperature distributions in the vapor phase and the mass flux from the high temperature surface to the low one are obtained for the various inverse Knudsen numbers. The negative temperature gradient in the vapor phase between the two surfaces is observed in some particular conditions and explained from the kinetic theory viewpoint. Furthermore, by employing the finite element method to the two-surface evaporation and condensation problem in the presence of noncondensable gas, the effects of the noncondensable gas on the mass flux and on the negative temperature gradient are investigated. For the description of this problem, the linearized GK model equations are used. As a result, it is found that the presence of noncondensable gas plays a decisive role in retarding the mass flow rates and makes the occurrence of the negative temperature gradient difficult.
- 宇宙航空研究開発機構の論文
宇宙航空研究開発機構 | 論文
- 大樹航空宇宙実験場における新しい大気球実験場
- M-3H TVC装置について
- M-3C TVC装置について
- 小型超音速実験機(ロケット実験機;NEXST-1)第2回飛行実験
- S520-8CN号機による乙女座銀河団の紫外線撮像観測