Three periods of drying of a single square capillary tube

The drying kinetics of a porous medium is classically described in three main periods, which depend on the interplay between the external and internal mass transfers during evaporation. The first period is described as essentially depending on the external mass transfer, whereas the third period is...

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Bibliographic Details
Published in:Physical review letters 2009-09, Vol.103 (12), p.124502-124502, Article 124502
Main Authors: Chauvet, F, Duru, P, Geoffroy, S, Prat, M
Format: Article
Language:English
Subjects:
Chemistry, Pharmaceutical
Desiccation
Engineering Sciences
Fluids mechanics
Mechanics
Microfluidics
Models, Chemical
Volatilization
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Summary:The drying kinetics of a porous medium is classically described in three main periods, which depend on the interplay between the external and internal mass transfers during evaporation. The first period is described as essentially depending on the external mass transfer, whereas the third period is dominated by the internal mass transfer. The second period is a crossover period. We show experimentally that a similar drying kinetics can be obtained from a much simpler system owing to the effect of corner liquid films: a capillary tube of square cross section.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.103.124502