Coating of a textured solid

Jacopo Seiwert 1, 2 Christophe Clanet 1, 2 David Quéré 1, 2, *
* Corresponding author
1 LadHyX - Laboratoire d'hydrodynamique
2 PMMH - Physique et mécanique des milieux hétérogenes
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.
Document type :
Journal articles
Complete list of metadatas

Cited literature [17 references]  Display  Hide  Download
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, July 4, 2019 - 11:00:05 AM
Long-term archiving on : Thursday, November 20, 2014 - 4:07:52 PM

File

S0022112010005951a.pdf
Publisher files allowed on an open archive

Identifiers

Collections

X-LADHYX | PMMH | PARISTECH | X | ESPCI | UPMC | PSL | X-DEP-MECA | SORBONNE-UNIVERSITE | UNIV-PARIS7 | USPC | SU-SCIENCES

Citation

Jacopo Seiwert, Christophe Clanet, David Quéré. Coating of a textured solid. Journal of Fluid Mechanics, Cambridge University Press (CUP), 2011, 669 (february), pp.55-63. ⟨10.1017/s0022112010005951⟩. ⟨hal-00997969⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

779

Files downloads

721

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD