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Wicking and evaporation of liquids in porous wicks: a simple analytical approach to optimization of wick design

Beyhaghi, Saman and Geoffroy, Sandrine and Prat, Marc and Pillai, Krishna M. Wicking and evaporation of liquids in porous wicks: a simple analytical approach to optimization of wick design. (2014) AIChE Journal, 60 (5). 1930-1940. ISSN 0001-1541

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Official URL: http://dx.doi.org/10.1002/aic.14353

Abstract

Wicking and evaporation of volatile liquids in porous, cylindrical wicks is investigated where the goal is to model, using simple analytical expressions, the effects of variation in geometrical parameters of a wick, such as porosity, height and bead-size, on the wicking and evaporation processes, and find optimum design conditions. An analytical sharp-front flow model involving the single-phase Darcy’s law is combined with analytical expressions for the capillary suction pressure and wick permeability to yield a novel analytical approach for optimizing wick parameters. First, the optimum beadradius and porosity maximizing the wicking flow-rate are estimated. Later, after combining the wicking model with evaporation from the wick-top, the allowable ranges of bead-radius, height and porosity for ensuring full saturation of the wick are calculated. The analytical results are demonstrated using some highly volatile alkanes in a polycarbonate sintered wick.

Item Type:Article
Additional Information:Thanks to John Wiley & Sons editor. The definitive version is available at http://onlinelibrary.wiley.com/doi/10.1002/aic.14353/abstract
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 - INPT (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > University of Wisconsin - Milwaukee (USA)
Laboratory name:
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Deposited By: Marc PRAT
Deposited On:02 Jun 2014 12:55

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