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Journal articles
Coating of a textured solid
Abstract : We discuss how a solid textured with well-defined micropillars entrains a film when extracted out of a bath of wetting liquid. At low withdrawal velocity V, it is shown experimentally that the film exactly fills the gap between the pillars; its thickness hd is independent of V and corresponds to the pillar height hp. At larger velocity, hd slowly increases with V and tends towards the Landau-Levich-Derjaguin (LLD) thickness h LLD observed on a flat solid. We model the entrainment by adapting the LLD theory to a double layer consisting of liquid trapped inside the texture and covered by a free film. This model allows us to understand quantitatively our different observations and to predict the transition between hp and hLLD. © 2011 Cambridge University Press.
Cited literature [17 references]
https://hal-polytechnique.archives-ouvertes.fr/hal-00997969
Contributor : Denis Roura <>
Submitted on : Thursday, July 17, 2014 - 9:38:29 AM
Last modification on : Thursday, December 17, 2020 - 11:42:05 AM
Long-term archiving on: : Thursday, November 20, 2014 - 4:07:52 PM
Contributor : Denis Roura <>
Submitted on : Thursday, July 17, 2014 - 9:38:29 AM
Last modification on : Thursday, December 17, 2020 - 11:42:05 AM
Long-term archiving on: : Thursday, November 20, 2014 - 4:07:52 PM
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