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Issue 42, 2016
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Dynamics of liquid plugs in prewetted capillary tubes: from acceleration and rupture to deceleration and airway obstruction

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Abstract

The dynamics of individual liquid plugs pushed at a constant pressure head inside prewetted cylindrical capillary tubes is investigated experimentally and theoretically. It is shown that, depending on the thickness of the prewetting film and the magnitude of the pressure head, the plugs can either experience a continuous acceleration leading to a dramatic decrease of their size and eventually their rupture or conversely, a progressive deceleration associated with their growth and an exacerbation of the airway obstruction. These behaviors are quantitatively reproduced using a simple nonlinear model [Baudoin et al., Proc. Natl. Acad. Sci. U. S. A., 2013, 110, 859] adapted here for cylindrical channels. Furthermore, an analytical criterion for the transition between these two regimes is derived and successfully compared with extensive experimental data. The potential implications of this work for pulmonary obstructive diseases are discussed.

Graphical abstract: Dynamics of liquid plugs in prewetted capillary tubes: from acceleration and rupture to deceleration and airway obstruction

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Publication details

The article was received on 24 Jun 2016, accepted on 17 Sep 2016 and first published on 19 Sep 2016


Article type: Paper
DOI: 10.1039/C6SM01463A
Citation: Soft Matter, 2016,12, 8710-8717
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    Dynamics of liquid plugs in prewetted capillary tubes: from acceleration and rupture to deceleration and airway obstruction

    J. C. Magniez, M. Baudoin, C. Liu and F. Zoueshtiagh, Soft Matter, 2016, 12, 8710
    DOI: 10.1039/C6SM01463A

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