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On continuous branches of very singular similarity solutions of the stable thin film equation. II – Free-boundary problems

Published online by Cambridge University Press:  21 February 2011

J. D. EVANS  and
V. A. GALAKTIONOV
J. D. EVANS
Affiliation:
Department of Mathematical Sciences, University of Bath, Bath, BA2 7AY, UK email: [email protected], [email protected]
V. A. GALAKTIONOV
Affiliation:
Department of Mathematical Sciences, University of Bath, Bath, BA2 7AY, UK email: [email protected], [email protected]
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Abstract

We discuss the fourth-order thin film equation with a stable second-order diffusion term, in the context of a standard free-boundary problem with zero height, zero contact angle and zero-flux conditions imposed at an interface. For the first critical exponent where N ≥ 1 is the space dimension, there are continuous sets (branches) of source-type very singular self-similar solutions of the form For p ≠ p0, the set of very singular self-similar solutions is shown to be finite and consists of a countable family of branches (in the parameter p) of similarity profiles that originate at a sequence of critical exponents {pl, l ≥ 0}. At p = pl, these branches appear via a non-linear bifurcation mechanism from a countable set of second kind similarity solutions of the pure thin film equation Such solutions are detected by a combination of linear and non-linear ‘Hermitian spectral theory’, which allows the application of an analytical n-branching approach. In order to connect with the Cauchy problem in Part I, we identify the cauchy problem solutions as suitable ‘limits’ of the free-boundary problem solutions.

Keywords

Stable thin film equationGlobal similarity solutionsAsymptotic behaviourBranchingBifurcationsHermitian spectral theory
Type
Papers
Information
European Journal of Applied Mathematics , Volume 22 , Issue 3 , June 2011 , pp. 245 - 265
Copyright
Copyright © Cambridge University Press 2011

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References

[1]Bernis, F. (1988) Source-type solutions of fourth order degenerate parabolic equations. In: Ni, W.-M., Peletier, L. A. & Serrin, J. (editors), Proc. Microprogram Nonlinear Diffusion Eqs Equilibrium States, Vol. 1, MSRI Publications, Berkeley, CA, USA, pp. 123–146.Google Scholar
[2]Bernis, F. & Friedman, A. (1990) Higher order nonlinear degenerate parabolic equations. J. Differ. Equ. 83, 179–206.CrossRefGoogle Scholar
[3]Bernis, F. & McLeod, J. B. (1991) Similarity solutions of a higher order nonlinear diffusion equation. Nonlinear Anal. 17, 1039–1068.Google Scholar
[4]Bernis, F., Peletier, L. A. & Williams, S. M. (1992) Source-type solutions of a fourth order nonlinear degenerate parabolic equation. Nonlinear Anal. Theory Methods Appl. 18, 217–234.CrossRefGoogle Scholar
[5]Evans, J. D., Galaktionov, V. A. & King, J. R. (2007a) Blow-up similarity solutions of the fourth-order unstable thin film equation. Eur. J. Appl. Math. 18, 195–231.CrossRefGoogle Scholar
[6]Evans, J. D., Galaktionov, V. A. & King, J. R. (2007b) Source-type solutions for the fourth-order unstable thin film equation. Eur. J. Appl. Math. 18, 273–321.CrossRefGoogle Scholar
[7]Evans, J. D., Galaktionov, V. A. & King, J. R. (2007c) Unstable sixth-order thin film equation. I. Blow-up similarity solutions; II. Global similarity patterns. Nonlinearity 20, 1799–1841, 1843–1881.CrossRefGoogle Scholar
[8]Evans, J. D., Galaktionov, V. A. & Williams, J. F. (2006) Blow-up and global asymptotics of the limit unstable Cahn–Hilliard equation. SIAM J. Math. Anal. 38, 64–102.CrossRefGoogle Scholar
[9]Ferreira, R. & Bernis, F. (1997) Source-type solutions to thin-film equations in higher dimensions. Eur. J. Appl. Math. 8, 507–534.CrossRefGoogle Scholar
[10]Galaktionov, V. A. (2010) Very singular solutions for thin film equations with absorption. Studies Appl. Math. 124, 39–63 (arXiv:0109.3982).CrossRefGoogle Scholar
[11]Galaktinov, V. A. & Harwin, P. J. (2005) Non-uniqueness and global similarity solutions for a higher-order semilinear parabolic equation. Nonlinearity 18, 717–746.CrossRefGoogle Scholar
[12]Galaktionov, V. A. & Williams, J. F. (2004) On very singular similarity solutions of a higher-order semilinear parabolic equation. Nonlinearity 17, 1075–1099.CrossRefGoogle Scholar
[13]Wu, Z., Zhao, J., Yin, J. & Li, H. (2001) Nonlinear Diffusion Equations, World Scientific Publishing Company, River Edge, NJ, USA.CrossRefGoogle Scholar