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Title
Investigation of diffusive and optical properties of vapour-air mixtures: The benefits of interferometry
Author
Shevtsova, ValentinaMondragon Unibertsitatea
Author (from another institution)
Shevchenko, V.
Mialdun, Aliaksandr
Yasnou, V.
Lyulin, Y. V.
Ouerdane, H.
Research Group
Mecánica de fluidos
Published Date
2021
Publisher
Elsevier Ltd.
Keywords
Interferometry
Vapor-in-air diffusion coefficient
Vapor optical properties
Acetone
HFE-7100
Abstract
While interferometry has been widely used for diffusion measurements in liquid mixtures, it was hardly applied so far to vapour-gas mixtures. The present work aims to bridge this gap. Using an improve ... [+]
While interferometry has been widely used for diffusion measurements in liquid mixtures, it was hardly applied so far to vapour-gas mixtures. The present work aims to bridge this gap. Using an improved Mach–Zehnder interferometer, we investigate the evaporation of acetone and HFE-7100 in ambient air. Our observations build on complete evaporation of a thin liquid layer in a cell with open end, at ambient temperature varying between 283.15 and 313.15 K. Monitoring the evolution of the refractive index change allows us to determine the evaporation rate and vapour-in-air diffusion coefficients. The spatial distribution of the refractive index reveals that the purely diffusive mode of transport is perturbed at both ends of the cell. Interferometric images facilitate isolating these regions, determining the true diffusion path, and hence, the correct diffusion coefficients. Besides, we illustrate the possibility of calculating the optical contrast factors, which we find in excellent agreement with current experiments. [-]
URI
http://hdl.handle.net/20.500.11984/5231
Publisher’s version
https://doi.org/10.1016/j.ces.2020.116433
ISSN
0009-2509
Published at
Chemical Engineering Science  Chemical Engineering Science. Vol. 233. N. artículo 116433, 2021
Document type
Article
Version
Postprint – Accepted Manuscript
Rights
© 2021 Elsevier Ltd.
Access
Embargoed Access (until 2023-04-30)
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  • Articles - Engineering [309]

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