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Capillary-Driven Flow in Liquid Filaments Connecting Orthogonal ChannelsCapillary phenomena plays an important role in the management of product water in PEM fuel cells because of the length scales associated with the porous layers and the gas flow channels. The distribution of liquid water within the network of gas flow channels can be dramatically altered by capillary flow. We experimentally demonstrate the rapid movement of significant volumes of liquid via capillarity through thin liquid films which connect orthogonal channels. The microfluidic experiments discussed provide a good benchmark against which the proper modeling of capillarity by computational models may be tested. The effect of surface wettability, as expressed through the contact angle, on capillary flow will also be discussed.
Document ID
20050203862
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Allen, Jeffrey S.
(National Center for Microgravity Research on Fluids and Combustion Cleveland, OH, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Fluid Mechanics And Thermodynamics
Funding Number(s)
CONTRACT_GRANT: NCC3-975
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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