Authors
Date (dd-mm-yyyy)
2016-07-10
Title
Evaporation of water
Subtitle
Evaporation rate and collective effects
Journal
Journal of Fluid Mechanics
Volume
798
Publication Year
2016-07-10
Pages
774-786
Document type
Article
Faculty
Faculty of Science (FNWI)
Institute
Van der Waals-Zeeman Institute (WZI)
Institute of Physics (IoP)
Abstract

We study the evaporation rate from single drops as well as collections of drops on a solid substrate, both experimentally and theoretically. For a single isolated drop of water, in general the evaporative flux is limited by diffusion of water through the air, leading to an evaporation rate that is proportional to the linear dimension of the drop. Here, we test the limitations of this scaling law for several small drops and for very large drops. We find that both for simple arrangements of drops, as well as for complex drop size distributions found in sprays, cooperative effects between drops are significant. For large drops, we find that the onset of convection introduces a length scale of approximately 20 mm in radius, below which linear scaling is found. Above this length scale, the evaporation rate is proportional to the surface area.

URL
go to publisher's site
Permalink
https://hdl.handle.net/11245.1/53c4ee6a-0d3d-4471-bc15-21b84654cb10