垂直膜的对流蒸发
Convective evaporation of vertical films
摘要：
肥皂膜的蒸发，这对他们的寿命有显着的影响，我们进行了实验研究的垂直表面的蒸发与模型系统的基础上水凝胶。从传热和传质之间的类比，我们采用了一个模型描述的自然对流在气相中，由于干燥和饱和空气之间的密度差。我们的测量结果表明，无论是在与Grashof数的标度律和数量级方面，与这个模型有很好的一致性。我们讨论的修正，考虑到，特别是边缘效应的贡献，这有一个小的，但明显的贡献时，横向和底部的表面面积是不可忽略的主要蒸发表面积相比。
英文摘要：
Motivated by the evaporation of soap films, which has a significant effect on their lifetime, we performed an experimental study on the evaporation of vertical surfaces with model systems based on hydrogels. From the analogy between heat and mass transfer, we adopt a model describing the natural convection in the gas phase due to a density contrast between dry and saturated air. Our measurements show a good agreement with this model, both in terms of scaling law with the Grashof number and in terms of order of magnitude. We discuss the corrections to take into account, notably the contribution of edge effects, which have a small but visible contribution when lateral and bottom surface areas are not negligible compared to the main evaporating surface area.
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