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Issue 9, 2018
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Convective evaporation of vertical films

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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.

Graphical abstract: Convective evaporation of vertical films

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21 Sep 2017
22 Jan 2018
First published
22 Jan 2018

Soft Matter, 2018,14, 1665-1671
Article type

Convective evaporation of vertical films

F. Boulogne and B. Dollet, Soft Matter, 2018, 14, 1665
DOI: 10.1039/C7SM01902E

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