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Enhanced evaporation from an oscillating liquid in a capillary tube

Polezhaev, Denis and Duru, Paul and Plouraboué, Franck Enhanced evaporation from an oscillating liquid in a capillary tube. (2016) International Journal of Heat and Mass Transfer, 95. 288-295. ISSN 00179310

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.12.012


Enhanced evaporation inside a capillary tube into which the liquid/gas meniscus oscillates is experimentally studied. It is found that the meniscus oscillation can markedly level-off the evaporation rate, while keeping an apparent diffusive behaviour. The apparent diffusive coefficient can reach a tenfold increase in the explored range of parameters. The dependence of the effect is studied by varying the capillary tube diameter, the frequency and the amplitude of the liquid oscillations. The parametric dependence of the apparent diffusive coefficient is well captured by the associated dimensionless Péclet number. A nice collapse of the experimental measurements consistent with a quadratic scaling with Péclet number is found. Such scaling is suggested by previous theoretical and experimental analysis associated with a Taylor dispersion transport mechanism. Nevertheless the prefactor of those theory is found to under-predict the observed effect by a factor three. This deviation from Taylor’s dispersion driven transport predictions is discussed.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at International Journal of Heat and Mass Transfer website :http://www.sciencedirect.com/science/article/pii/S0017931015303112
HAL Id:hal-01252783
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Perm State Humanitarian Pedagogical University - PSHPU (RUSSIA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:08 Jan 2016 10:20

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