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目前还没有现成的理论可以对He II粘度进行合理的说明和计算,在大多数情况下还只能依靠实验技术来满足其工程需要。本文对传统实验技术,目前出现的各种改进型实验技术进行了概述,事实表明不同的实验技术所得的结果之间偶有符合,但不能从根本上解决He II粘度对实验技术的依赖性,目前的实验技术还无法提供He II粘度数值的一致性结论。但是通过对He II粘度与温度之间的变化趋势、数值的数量级等方面的分析,证明了He II粘度在1.6 K~1.8 K之间形成了最小值区域。当温度继续低于1.6 K时,He II粘度会迅速增加,同样在温度高于1.8 K时,随着温度的增加,He II粘度也会迅速增加。
At present, there is no theory that can be used to explain and calculate He II viscosity reasonably. In most cases, experimental techniques can only be used to meet the engineering needs. In this paper, we summarize the traditional experimental techniques and the various improved experimental techniques that appear at present. The facts show that the results obtained by different experimental techniques are occasionally consistent, but the dependence of He II viscosity on experimental techniques can not be fundamentally solved. Current experimental techniques still do not provide consistent conclusions about He II viscosity numbers. However, by analyzing the trend of He II viscosity and temperature, the order of magnitude and other aspects, it is proved that He II viscosity forms the minimum region between 1.6 K and 1.8 K. As the temperature continues to drop below 1.6 K, the viscosity of He II increases rapidly, and as the temperature rises above 1.8 K, the viscosity of He II increases rapidly with increasing temperature.