Measurement of the Temperature Decrease in Evaporating Soap Films.
Measurement of the Temperature Decrease in Evaporating Soap Films.
复制标题
蒸发皂膜温度降低的测量。
作者：
François Boulogne;F. Restagno;E. Rio
最近的进展表明，蒸发对肥皂膜的稳定性起着重要作用，这是许多工业领域的一个关键问题，也是儿童玩泡泡的关键问题。因此，蒸发会导致薄膜变薄，但也会导致薄膜冷却，这一点在肥皂类物体中被忽视了。在这里，我们研究了不同相对湿度值和甘油浓度下蒸发肥皂膜的温度变化。我们证明，肥皂膜的温度可以降低后，他们的创造高达8°C。我们提出了一个描述肥皂膜形成后温度下降的模型，该模型与我们的实验结果在定量上是一致的。我们强调，这种冷却效应是显著的，必须仔细考虑在未来的研究肥皂膜的动力学。
Recent advances have demonstrated that evaporation can play a significant role on soap film stability, which is a key concern in many industrial areas but also for children playing with bubbles. Thus, evaporation leads to a film thinning but also to a film cooling, which has been overlooked for soapy objects. Here, we study the temperature variation of an evaporating soap film for different values of relative humidity and glycerol concentrations. We evidence that the temperature of soap films can decrease after their creation up to 8 °C. We propose a model describing the temperature drop of soap films after their formation that is in quantitative agreement with our experiments. We emphasize that this cooling effect is significant and must be carefully considered in future studies on the dynamics of soap films.