頁籤選單縮合
| 題 名 | Effect of Vapor Superheating on Mixed-Convection Film Condensation along an Isothermal Vertical Cylinder |
|---|---|
| 作 者 | Chang, T.-B.; | 書刊名 | Journal of Mechanics |
| 卷 期 | 26:1 2010.03[民99.03] |
| 頁 次 | 頁N1-N7 |
| 分類號 | 460.027 |
| 關鍵詞 | Vapor superheating; Film condensation; Forced-flow; |
| 語 文 | 英文(English) |
| 英文摘要 | This paper presents an analytical investigation into the effect of vapor superheating on the mixed-convection of a condensate layer flowing along the outside surface of an isothermal vertical cylinder. The governing system of partial differential equations is transformed into a dimensionless form using the nonsimilar transformation method. In investigating the heat transfer characteristics within the condensate layer and vapor phase, the analysis takes account of both the inertia effects and the convection effects within the condensate layer and the shear resistance at the liquid-vapor interface. The numerical results reveal that vapor superheating has a negligible effect on the temperature profile and local Nusselt number within the condensate layer. Moreover, it is found that a higher forced-flow intensity increases the temperature gradient in the vapor phase, but has a marginal effect on the temperature profile in the condensate layer. Finally, it is shown that the velocity at the liquid-vapor interface increases as the intensity of the forced-flow increases or as the ratio of the condensate layer viscosity to the vapor phase viscosity reduces. |
本系統中英文摘要資訊取自各篇刊載內容。