New data on two-phase, two-component heat transfer and hydrodynamics in a vertical tube

被引：0

作者：

Rezkallah, Kamiel S. ^{[1
]}

Sims, Grant E. ^{[1
]}

机构：

[1] Univ of Manitoba, Canada

来源：

Journal of thermophysics and heat transfer | 1989年 / 3卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Flow of Fluids--Two Phase - Hydrodynamics;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In forced-convective, two-phase, two-component (gas-liquid) flow, experimental data for mean heat-transfer coefficients, pressure drop and flow patterns were taken simultaneously for the flow in a 0.46-in. (1.17-cm) i.d. electrically heated vertical tube using three liquids: water, a glycerine-water solution (58-42% by weight), and silicone liquid (Dow Corning 200, 5 cS viscosity grade) with air as the gas phase. The combination of silicone liquid and the glycerine-water solution provided a set of data, appearing for the first time in the literature, in which the surface tension changed by a factor of 3.4 (being lower for the silicone liquid) with a rough matching of other hydrodynamic properties and a precise matching of the Prandtl number (63 at 25°C). The flow-pattern results showed a significant change in the bubble-slug boundary for the silicone liquid compared with the glycerine-water solution, whereas the total pressure drop for silicone/air in the range of superficial liquid velocity VSL of 0.910 &le VSL &le 2.26 ft/s (0.277 &le VSL &le 0.690 m/s) at high gas flow rates showed a sudden drop followed by a subsequent increase.

引用

页码：213 / 219