The spontaneous rise of Newtonian liquids in closed‐end capillaries is investigated with three different organics. Rise rate and equilibrium height are significantly reduced by a compression induced minor elevation in air pressure within the capillaries. We verify our earlier mathematical analysis quantifying viscous dissipation within air, and also show that the dynamic contact angle plays a material role. The relative importance of these varies with capillary dimensions. We also quantify the influence of atmospheric pressure variation and the temperature induced fluctuations in the rise height. A single parameter that relates static and dynamic contact angles is sufficient to match all of the data. This parameter is obtained from an open‐capillary experiment.

中文翻译：

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封闭式毛细血管上升－实验研究

用三种不同的有机物研究了封闭毛细管中牛顿液体的自发上升。压缩引起的毛细血管内空气压力轻微升高，显着降低了上升速率和平衡高度。我们验证了我们较早的数学分析，量化了空气中的粘性耗散，并且还表明动态接触角起着重要作用。这些的相对重要性随毛细管尺寸而变化。我们还量化了气压变化和温度引起的上升高度波动的影响。关联静态和动态接触角的单个参数足以匹配所有数据。此参数是从开放式毛细管实验获得的。