Localization, smoothness, and convergence to equilibrium for a thin film equation

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November 2014, 34(11): 4537-4553. doi: 10.3934/dcds.2014.34.4537

Localization, smoothness, and convergence to equilibrium for a thin film equation

Eric A. Carlen ^1, and Süleyman Ulusoy ^2,

1.	Department of Mathematics, Hill Center, Rutgers University, Piscataway, NJ 08854, United States
2.	Department of Mathematics, Faculty of Education, Zirve University, Gaziantep, Turkey

Received April 2013 Revised February 2014 Published May 2014

Abstract
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We investigate the long-time behavior of weak solutions to the thin-film type equation $$v_t =(xv - vv_{xxx})_x\ ,$$ which arises in the Hele-Shaw problem. We estimate the rate of convergence of solutions to the Smyth-Hill equilibrium solution, which has the form $\frac{1}{24}(C^2-x^2)^2_+$, in the norm $$|\!|\!| f |\!|\!|_{m,1}^2 = \int_{\mathbb{R}}(1+ |x|^{2m})|f(x)|^2 \, dx + \int_{\mathbb{R}}|f_x(x)|^2 \, dx.$$ We obtain exponential convergence in the $|\!|\!| \cdot |\!|\!|_{m,1}$ norm for all $m$ with $1\leq m< 2$, thus obtaining rates of convergence in norms measuring both smoothness and localization. The localization is the main novelty, and in fact, we show that there is a close connection between the localization bounds and the smoothness bounds: Convergence of second moments implies convergence in the $H^1$ Sobolev norm. We then use methods of optimal mass transportation to obtain the convergence of the required moments. We also use such methods to construct an appropriate class of weak solutions for which all of the estimates on which our convergence analysis depends may be rigorously derived. Though our main results on convergence can be stated without reference to optimal mass transportation, essential use of this theory is made throughout our analysis.

Keywords: Wasserstein distance, gradient flow, Thin-film equation, Euler-Lagrange equation., Lyapunov functional.

Mathematics Subject Classification: Primary: 35A15, 35B40, 35K25, 35K55, 35K65; Secondary: 35K4.

Citation: Eric A. Carlen, Süleyman Ulusoy. Localization, smoothness, and convergence to equilibrium for a thin film equation. Discrete & Continuous Dynamical Systems - A, 2014, 34 (11) : 4537-4553. doi: 10.3934/dcds.2014.34.4537

References:

[1]	L. Ambrosio, N. Gigli and G. Savaré, Gradient flows in metric spaces and in the Wasserstein space of probability measures,, Birkhäuser Verlag, (2005). Google Scholar
[2]	L. Ansini and L. Giacomelli, Doubly nonlinear thin-film equation in one space dimension,, Arch. Ration. Mech. Anal., 173 (2004), 89. doi: 10.1007/s00205-004-0313-x. Google Scholar
[3]	J. Becker and G. Grün, The thin-film equation: Recent advances and some new perspectives,, J. Phys.: Condens. Matter, 17 (2005), 291. doi: 10.1088/0953-8984/17/9/002. Google Scholar
[4]	F. Bernis and A. Friedman, Higher order nonlinear degenerate parabolic equations,, J. Diff. Eqns., 83 (1990), 179. doi: 10.1016/0022-0396(90)90074-Y. Google Scholar
[5]	A. Bertozzi, The mathematics of moving contact lines in thin liquid films,, Notices AMS, 45 (1998), 689. Google Scholar
[6]	A. Bertozzi and M. Pugh, The lubrication approximation for thin viscous films: Regularity and long time behavior of weak solutions,, Comm. Pure Appl. Math., 49 (1996), 85. doi: 10.1002/(SICI)1097-0312(199602)49:2<85::AID-CPA1>3.0.CO;2-2. Google Scholar
[7]	M. Bertsch, R. Dal Passo, H. Garcke and G. Grün, The thin viscous flow equation in higher space dimensions,, Adv. Diff. Eqns., 3 (1998), 417. Google Scholar
[8]	M. Boutat, S. Hilout, J. E. Rakotoson and J. M. Rakotoson, A generalized thin-film equation in multidimensional space,, Nonlinear Anal. TMA, 69 (2008), 1268. doi: 10.1016/j.na.2007.06.028. Google Scholar
[9]	Y. Brenier, Polar factorization and monotone rearrangement of vector-valued functions,, Comm. Pure Appl. Math., 44 (1991), 375. doi: 10.1002/cpa.3160440402. Google Scholar
[10]	E. A. Carlen and S. Ulusoy, Asymptotic equipartition and long time behavior of solutions of a thin-film equation,, J. Diff. Eqns., 241 (2007), 279. doi: 10.1016/j.jde.2007.07.005. Google Scholar
[11]	J. A. Carrillo and G. Toscani, Long-time asymptotics for strong solutions of the thin-film equation,, Comm. Math. Phys., 225 (2002), 551. doi: 10.1007/s002200100591. Google Scholar
[12]	M. Chugunova, M. Pugh and R. M. Taranets, Nonnegative solutions for a long-wave unstable thin film equation with convection,, SIAM J. Math. Anal., 42 (2010), 1826. doi: 10.1137/090777062. Google Scholar
[13]	R. Dal Passo, H. Garcke and G. Grün, On a fourth-order degenerate parabolic equation: Global entropy estimates, existence, and qualitative behavior of solutions,, SIAM J. Math. Anal., 29 (1998), 321. doi: 10.1137/S0036141096306170. Google Scholar
[14]	L. Giacomelli and F. Otto, Variational formulation for the lubrication approximation of the Hele-Shaw flow,, Calc. Var. Part. Diff. Eq., 13 (2001), 377. doi: 10.1007/s005260000077. Google Scholar
[15]	G. Grün, Droplet spreading under weak slippage-existence for the Cauchy problem,, Comm. PDEs, 29 (2004), 1697. doi: 10.1081/PDE-200040193. Google Scholar
[16]	R. Jordan, D. Kinderlehrer and F. Otto, The variational formulation of the Fokker-Planck equation,, SIAM J. Math. Anal., 29 (1998), 1. doi: 10.1137/S0036141096303359. Google Scholar
[17]	R. Laugesen, New dissipated energies for the thin fluid film equation,, Comm. Pure Appl. Analysis, 4 (2005), 613. doi: 10.3934/cpaa.2005.4.613. Google Scholar
[18]	D. Matthes, R. J. McCann and G. Savaré, A family of nonlinear fourth order equations of gradient flow type,, Comm. PDEs, 34 (2009), 1352. doi: 10.1080/03605300903296256. Google Scholar
[19]	R. J. McCann, A convexity principle for interacting gases,, Adv. Math., 128 (1997), 153. doi: 10.1006/aima.1997.1634. Google Scholar
[20]	T. G. Myers, Thin films with high surface tension,, SIAM Rev., 40 (1998), 441. doi: 10.1137/S003614459529284X. Google Scholar
[21]	F. Otto, Lubrication approximation with prescribed nonzero contact angle,, Comm. PDEs, 23 (1998), 2077. doi: 10.1080/03605309808821411. Google Scholar
[22]	F. Otto, The geometry of dissipative evolution equations: The porous medium equation,, Comm. PDEs, 26 (2001), 101. doi: 10.1081/PDE-100002243. Google Scholar
[23]	J. E. Rakotoson, J. M. Rakotoson and C. Verbeke, Higher order equations related to thin films: Blow-up and global existence, the influence of the initial data,, J. Diff. Eqns., 244 (2008), 2693. doi: 10.1016/j.jde.2008.03.009. Google Scholar
[24]	N. F. Smyth and J. M. Hill, High-order nonlinear diffusion,, IMA J. Appl. Math., 40 (1988), 73. doi: 10.1093/imamat/40.2.73. Google Scholar
[25]	A. Tudorascu, Lubrication approximation for viscous flows: asyptotic behavior of nonnegative solutions,, Comm. PDEs, 32 (2007), 1147. doi: 10.1080/03605300600987272. Google Scholar
[26]	S. Ulusoy, A new family of higher order nonlinear degenerate parabolic equations,, Nonlinearity, 20 (2007), 685. doi: 10.1088/0951-7715/20/3/007. Google Scholar
[27]	S. Ulusoy, On a new family of higher order nonlinear degenerate parabolic equations,, Appl. Math. Res. eXpress, 2007 (2007). doi: 10.1088/0951-7715/20/3/007. Google Scholar
[28]	S. Ulusoy, The Mathematical Theory of Thin Film Evolution,, Ph.D thesis, (2007). Google Scholar
[29]	C. Villani, Topics in Optimal Transportation,, Grad. Stud. Math., 58 (2003). doi: 10.1007/b12016. Google Scholar
[30]	J. L. Vazquez, The Porous Medium Equation. Mathematical Theory,, Oxford Mathematical Monographs. The Clarendon Press, (2007). Google Scholar

show all references

References:

[1]	L. Ambrosio, N. Gigli and G. Savaré, Gradient flows in metric spaces and in the Wasserstein space of probability measures,, Birkhäuser Verlag, (2005). Google Scholar
[2]	L. Ansini and L. Giacomelli, Doubly nonlinear thin-film equation in one space dimension,, Arch. Ration. Mech. Anal., 173 (2004), 89. doi: 10.1007/s00205-004-0313-x. Google Scholar
[3]	J. Becker and G. Grün, The thin-film equation: Recent advances and some new perspectives,, J. Phys.: Condens. Matter, 17 (2005), 291. doi: 10.1088/0953-8984/17/9/002. Google Scholar
[4]	F. Bernis and A. Friedman, Higher order nonlinear degenerate parabolic equations,, J. Diff. Eqns., 83 (1990), 179. doi: 10.1016/0022-0396(90)90074-Y. Google Scholar
[5]	A. Bertozzi, The mathematics of moving contact lines in thin liquid films,, Notices AMS, 45 (1998), 689. Google Scholar
[6]	A. Bertozzi and M. Pugh, The lubrication approximation for thin viscous films: Regularity and long time behavior of weak solutions,, Comm. Pure Appl. Math., 49 (1996), 85. doi: 10.1002/(SICI)1097-0312(199602)49:2<85::AID-CPA1>3.0.CO;2-2. Google Scholar
[7]	M. Bertsch, R. Dal Passo, H. Garcke and G. Grün, The thin viscous flow equation in higher space dimensions,, Adv. Diff. Eqns., 3 (1998), 417. Google Scholar
[8]	M. Boutat, S. Hilout, J. E. Rakotoson and J. M. Rakotoson, A generalized thin-film equation in multidimensional space,, Nonlinear Anal. TMA, 69 (2008), 1268. doi: 10.1016/j.na.2007.06.028. Google Scholar
[9]	Y. Brenier, Polar factorization and monotone rearrangement of vector-valued functions,, Comm. Pure Appl. Math., 44 (1991), 375. doi: 10.1002/cpa.3160440402. Google Scholar
[10]	E. A. Carlen and S. Ulusoy, Asymptotic equipartition and long time behavior of solutions of a thin-film equation,, J. Diff. Eqns., 241 (2007), 279. doi: 10.1016/j.jde.2007.07.005. Google Scholar
[11]	J. A. Carrillo and G. Toscani, Long-time asymptotics for strong solutions of the thin-film equation,, Comm. Math. Phys., 225 (2002), 551. doi: 10.1007/s002200100591. Google Scholar
[12]	M. Chugunova, M. Pugh and R. M. Taranets, Nonnegative solutions for a long-wave unstable thin film equation with convection,, SIAM J. Math. Anal., 42 (2010), 1826. doi: 10.1137/090777062. Google Scholar
[13]	R. Dal Passo, H. Garcke and G. Grün, On a fourth-order degenerate parabolic equation: Global entropy estimates, existence, and qualitative behavior of solutions,, SIAM J. Math. Anal., 29 (1998), 321. doi: 10.1137/S0036141096306170. Google Scholar
[14]	L. Giacomelli and F. Otto, Variational formulation for the lubrication approximation of the Hele-Shaw flow,, Calc. Var. Part. Diff. Eq., 13 (2001), 377. doi: 10.1007/s005260000077. Google Scholar
[15]	G. Grün, Droplet spreading under weak slippage-existence for the Cauchy problem,, Comm. PDEs, 29 (2004), 1697. doi: 10.1081/PDE-200040193. Google Scholar
[16]	R. Jordan, D. Kinderlehrer and F. Otto, The variational formulation of the Fokker-Planck equation,, SIAM J. Math. Anal., 29 (1998), 1. doi: 10.1137/S0036141096303359. Google Scholar
[17]	R. Laugesen, New dissipated energies for the thin fluid film equation,, Comm. Pure Appl. Analysis, 4 (2005), 613. doi: 10.3934/cpaa.2005.4.613. Google Scholar
[18]	D. Matthes, R. J. McCann and G. Savaré, A family of nonlinear fourth order equations of gradient flow type,, Comm. PDEs, 34 (2009), 1352. doi: 10.1080/03605300903296256. Google Scholar
[19]	R. J. McCann, A convexity principle for interacting gases,, Adv. Math., 128 (1997), 153. doi: 10.1006/aima.1997.1634. Google Scholar
[20]	T. G. Myers, Thin films with high surface tension,, SIAM Rev., 40 (1998), 441. doi: 10.1137/S003614459529284X. Google Scholar
[21]	F. Otto, Lubrication approximation with prescribed nonzero contact angle,, Comm. PDEs, 23 (1998), 2077. doi: 10.1080/03605309808821411. Google Scholar
[22]	F. Otto, The geometry of dissipative evolution equations: The porous medium equation,, Comm. PDEs, 26 (2001), 101. doi: 10.1081/PDE-100002243. Google Scholar
[23]	J. E. Rakotoson, J. M. Rakotoson and C. Verbeke, Higher order equations related to thin films: Blow-up and global existence, the influence of the initial data,, J. Diff. Eqns., 244 (2008), 2693. doi: 10.1016/j.jde.2008.03.009. Google Scholar
[24]	N. F. Smyth and J. M. Hill, High-order nonlinear diffusion,, IMA J. Appl. Math., 40 (1988), 73. doi: 10.1093/imamat/40.2.73. Google Scholar
[25]	A. Tudorascu, Lubrication approximation for viscous flows: asyptotic behavior of nonnegative solutions,, Comm. PDEs, 32 (2007), 1147. doi: 10.1080/03605300600987272. Google Scholar
[26]	S. Ulusoy, A new family of higher order nonlinear degenerate parabolic equations,, Nonlinearity, 20 (2007), 685. doi: 10.1088/0951-7715/20/3/007. Google Scholar
[27]	S. Ulusoy, On a new family of higher order nonlinear degenerate parabolic equations,, Appl. Math. Res. eXpress, 2007 (2007). doi: 10.1088/0951-7715/20/3/007. Google Scholar
[28]	S. Ulusoy, The Mathematical Theory of Thin Film Evolution,, Ph.D thesis, (2007). Google Scholar
[29]	C. Villani, Topics in Optimal Transportation,, Grad. Stud. Math., 58 (2003). doi: 10.1007/b12016. Google Scholar
[30]	J. L. Vazquez, The Porous Medium Equation. Mathematical Theory,, Oxford Mathematical Monographs. The Clarendon Press, (2007). Google Scholar

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