Thin viscoelastic dewetting films of Jeffreys type subjected to gravity and substrate interactions

Document Type

Article

Publication Date

1-1-2019

Abstract

Abstract.: This work presents a study of the interfacial dynamics of thin viscoelastic films subjected to the gravitational force and substrate interactions induced by the disjoining pressure, in two spatial dimensions. The governing equation is derived as a long-wave approximation of the Navier-Stokes equations for incompressible viscoelastic liquids under the effect of gravity, with the Jeffreys model for viscoelastic stresses. For the particular cases of horizontal or inverted planes, the linear stability analysis is performed to investigate the influence of the physical parameters involved on the growth rate and length scales of instabilities. Numerical simulations of the nonlinear regime of the dewetting process are presented for the particular case of an inverted plane. Both gravity and the disjoining pressure are found to affect not only the length scale of instabilities, but also the final configuration of dewetting, by favoring the formation of satellite droplets, that are suppressed by the slippage with the solid substrate. Graphical abstract: [Figure not available: see fulltext.].

Identifier

85060582682 (Scopus)

Publication Title

European Physical Journal E

External Full Text Location

https://doi.org/10.1140/epje/i2019-11774-2

e-ISSN

1292895X

ISSN

12928941

PubMed ID

30687884

Issue

1

Volume

42

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