Dewetting processes in a cylindrical geometry

G. Callegari; A. Calvo; J. P. Hulin

doi:10.1140/epje/i2004-10082-4

Dewetting processes in a cylindrical geometry

G. Callegari, A. Calvo, J. P. Hulin

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Dewetting of liquid films of water-glycerol solutions of different viscosities has been studied experimentally in PVC cylindrical tubes. In contrast with plane surfaces, the dewetting capillary number Ca_vd increases with the film thickness h₀ over a large part of the experimental range and follows a same global trend independent of viscosity as a function of h₀. This increase is only partly explained by variations of the capillary driving force predicted in a recent theoretical work for a cylindrical geometry. An additional explanation is suggested, based on different spatial distributions of the viscous dissipation in the dewetting bump in the planar and cylindrical geometries. This mechanism is investigated for films of different thicknesses in a numerical model assuming a polynomial variation of the liquid thickness with distance in the bump region.

Original language	English (US)
Pages (from-to)	283-290
Number of pages	8
Journal	European Physical Journal E
Volume	16
Issue number	3
DOIs	https://doi.org/10.1140/epje/i2004-10082-4
State	Published - 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Biotechnology
Biophysics
General Chemistry
General Materials Science
Surfaces and Interfaces

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10.1140/epje/i2004-10082-4

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abstract = "Dewetting of liquid films of water-glycerol solutions of different viscosities has been studied experimentally in PVC cylindrical tubes. In contrast with plane surfaces, the dewetting capillary number Cavd increases with the film thickness h0 over a large part of the experimental range and follows a same global trend independent of viscosity as a function of h0. This increase is only partly explained by variations of the capillary driving force predicted in a recent theoretical work for a cylindrical geometry. An additional explanation is suggested, based on different spatial distributions of the viscous dissipation in the dewetting bump in the planar and cylindrical geometries. This mechanism is investigated for films of different thicknesses in a numerical model assuming a polynomial variation of the liquid thickness with distance in the bump region.",

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AU - Callegari, G.

AU - Calvo, A.

AU - Hulin, J. P.

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AB - Dewetting of liquid films of water-glycerol solutions of different viscosities has been studied experimentally in PVC cylindrical tubes. In contrast with plane surfaces, the dewetting capillary number Cavd increases with the film thickness h0 over a large part of the experimental range and follows a same global trend independent of viscosity as a function of h0. This increase is only partly explained by variations of the capillary driving force predicted in a recent theoretical work for a cylindrical geometry. An additional explanation is suggested, based on different spatial distributions of the viscous dissipation in the dewetting bump in the planar and cylindrical geometries. This mechanism is investigated for films of different thicknesses in a numerical model assuming a polynomial variation of the liquid thickness with distance in the bump region.

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JO - European Physical Journal E

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Dewetting processes in a cylindrical geometry

Abstract

All Science Journal Classification (ASJC) codes

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