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The Elastic Landau-Levich Problem on a Slope

Accepted version
Peer-reviewed

Type

Article

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Abstract

The elastic analogue of the Landau-Levich dip-coating problem, in which a plate is withdrawn from a bath of fluid on whose surface lies a thin elastic sheet, is analysed for angle of withdrawal θ to the horizontal. The flow is controlled by the elasticity number, El, which is a measure of the relative importance of viscous and bending stresses, and θ. The leading order solution for small El is a steady profile in which the thickness of the film on the plate is found to vary as El^3/4 /(1 − cos θ)^5/8 . This prediction is confirmed in the limit θ « 1 by comparison with numerical simulation. Finally, the circumstances under which the assumption of a steady solution is no longer valid are discussed, and the time-dependent solution is described.

Description

Keywords

thin films, lubrication theory, coating

Journal Title

Journal of Fluid Mechanics

Conference Name

Journal ISSN

0022-1120
1469-7645

Volume Title

883

Publisher

Cambridge University Press

Rights

All rights reserved
Sponsorship
Natural Environment Research Council (NE/L002507/1)
NERC (NE/L002507/1)