In this paper the two-phase propane flow through a copper capillary tube with an inner diameter of 1.1799 mm is thoroughly investigated according to metastable flow and hysteresis effects of the flow. The hysteresis effect causes ambiguity in experimental data of the two-phase pressure drop or mass flow. It is assumed that the hysteresis effect occurs when metastable flow is developed. As cause for the development of the metastable flow, the wetting ratio of the capillary tube is derived. The wetting ratio is considered to be the ratio of the length of the capillary that is covered by liquid flow only and the total capillary length. The findings are transferred into a mathematical description and supplemented into an existing homogeneous flow model. The extended model is able to simulate the general course of observed hysteresis courses and shows improvement in predicting the overall data base of previous work by being able to predict ambiguous data.

本文根据亚稳流和流的滞后效应，对通过内径为1.1799 mm的铜毛细管的两相丙烷流进行了深入研究。滞后效应在两相压降或质量流量的实验数据中引起歧义。假定当产生亚稳态流动时发生磁滞效应。作为产生亚稳流的原因，得出了毛细管的润湿率。润湿比被认为是仅被液体流覆盖的毛细管的长度与毛细管的总长度之比。研究结果被转化为数学描述，并被补充到现有的均质流动模型中。