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Quasi-static liquid–air drainage in narrow channels with variations in the gap

Geoffroy, Sandrine and Plouraboué, Franck and Prat, Marc and Amyot, Olivier Quasi-static liquid–air drainage in narrow channels with variations in the gap. (2006) Journal of Colloid and Interface Science, vol. 294 (n° 1). pp. 165-175. ISSN 0021-9797

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Official URL: http://dx.doi.org/10.1016/j.jcis.2005.07.008

Abstract

This paper studies the shape of an air bubble quasi-statically flowing in the longitudinal direction of narrow channels. Two bottom topographies are treated, i.e., linear and quadratic variations of the gap along the transverse direction. This work analyses the main characteristics of the gas–liquid interface with respect to the wedge aspect ratio. From the convergence of asymptotic, numerical and experimental analyses, we found simple dependences for the finger width and total curvature as a function of channel aspect ratio. These results provide simple and general expressions for the pressure drop needed to overcome capillary forces and push the air finger inside the channel.

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 Journal of Colloid and Interface Science website : http://www.sciencedirect.com/science/journal/00219797
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By: Franck PLOURABOUE

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