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Dewetting films: bifurcations and concentrations

A L Bertozzi1,2, G Grün3 and T P Witelski1

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Recommended by F Otto

Under the influence of long-range attractive and short-range repulsive forces, thin liquid films rupture and form complex dewetting patterns. This paper studies this phenomenon in one space dimension within the framework of fourth-order degenerate parabolic equations of lubrication type. We derive the global structure of the bifurcation diagram for steady-state solutions. A stability analysis of the solution branches and numerical simulations suggest coarsening occurs. Furthermore, we study the behaviour of solutions in the limit that short-range repulsive forces are neglected. Both asymptotic analysis and numerical experiments show that this limit can concentrate mass in δ-distributions.


PACS

02.30.Oz Bifurcation theory

68.15.+e Liquid thin films

05.45.-a Nonlinear dynamics and nonlinear dynamical systems

MSC

35G25 Initial value problems for nonlinear higher-order PDE, nonlinear evolution equations

35K55 Nonlinear PDE of parabolic type

35Q35 Other equations arising in fluid mechanics

Subjects

Soft matter, liquids and polymers

Mathematical physics

Surfaces, interfaces and thin films

Statistical physics and nonlinear systems

Dates

Issue 6 (November 2001)

Received 10 August 2000, in final form 3 May 2001

Published 21 September 2001



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