Spontaneous capillary flows in piecewise varying cross section microchannels

The study of the dynamics of capillary wetting has started in the 1920s with the studies of Lucas, Washburn, and Rideal. The LWR law states a square root dependency with time for the penetration distance. This property was shown to be valid for arbitrary, uniform cross section microchannels. However...

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Published inSensors and actuators. B, Chemical Vol. 223; pp. 868 - 877
Main Authors Berthier, Jean, Gosselin, David, Pham, Andrew, Boizot, François, Delapierre, Guillaume, Belgacem, Naceur, Chaussy, Didier
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.02.2016
Elsevier
Subjects
Capillarity
Capillary wetting
Channels
Cross sections
Dynamic tests
Dynamics
Engineering Sciences
Interface tracking
Lucas–Washburn–Rideal (LWR) law
Mathematical models
Microchannels
Spontaneous capillary flow (SCF)
Wetting
Lucas–Washburn–Rideal (LWR) law
Interface tracking
Capillary wetting
Spontaneous capillary flow (SCF)
Cross section channels
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Summary:The study of the dynamics of capillary wetting has started in the 1920s with the studies of Lucas, Washburn, and Rideal. The LWR law states a square root dependency with time for the penetration distance. This property was shown to be valid for arbitrary, uniform cross section microchannels. However, the dynamics of capillary wetting in non-uniform cross section channels is still a subject of investigation. In this work an analytical model for piecewise varying cross section channels is developed. It is shown that the model compares favorably to experiments. Moreover the results are also in agreement with a former numerical approach.
Bibliography:ObjectType-Article-1
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content type line 23
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2015.10.023