Effect of gravity on interfacial area transport of gas-liquid two-phase flow

在正常重力和微重力条件下，采用立体图像处理方法，测量了9 mm、5 mm和3 mm管径的绝热氮气-水泡状流的含气率分布、界面浓度和Sauter平均直径的轴向发展。根据实测数据和直观观察，详细讨论了重力对气泡径向分布和两相流参数轴向变化的影响。这些数据可用于发展可靠的本构关系，反映在正常和微重力环境下的两相流的真实传输机制。

In relation to the development of the interfacial area transport equation, axial developments of void fraction profile, interfacial area concentration and Sauter mean diameter of adiabatic nitrogen-water bubbly flows in 9 mm-, 5 mm- and 3 mm-diameter pipes were measured by using a stereo image-processing method under normal- and micro-gravity environment. The effect of gravity on radial distribution of bubbles and axial developments of two-phase flow parameter were discussed in detail based on the obtained data and the visual observation. These data can be used for the development of reliable constitutive relations which reflect the true transfer mechanisms in two-phase flow under normal and microgravity environments.