Spatial decay bounds in a linearized magnetohydrodynamic channel flow

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May 2013, 12(3): 1349-1361. doi: 10.3934/cpaa.2013.12.1349

Spatial decay bounds in a linearized magnetohydrodynamic channel flow

1.	Chung-Ang University, Heuksuk-Dong, Donggak-Gu, 156-756, South Korea
2.	Hanyang University, Ansan, Gyeonggido 426-791, South Korea

Received April 2012 Revised July 2012 Published September 2012

Abstract
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This paper establishes exponential decay bounds for a transient magnetohydrodynamic flow in a semi-infinite channel. If net entrance flows into the channel are nonzero, then the solutions will not tend to zero as the distance from the entrance end tends to infinity when homogeneous lateral surface boundary conditions and homogenous initial conditions are applied. Assuming that the entrance data are small enough so that flows converge to transient laminar flows as the distance from the entrance section tends to infinity, we linearize the magnetohydrodynamic equations and derive an integro-differential inequality that leads to an exponential decay estimate. This paper also indicates how to bound the total energy in the spirit of earlier work of Lin and Payne [11].

Keywords: Magnetohydrodynamic equations, spatial decay bounds..

Mathematics Subject Classification: Primary: 35B45, 35K55; Secondary: 76W0.

Citation: Julie Lee, J. C. Song. Spatial decay bounds in a linearized magnetohydrodynamic channel flow. Communications on Pure & Applied Analysis, 2013, 12 (3) : 1349-1361. doi: 10.3934/cpaa.2013.12.1349

References:

[1]	K. A. Ames, L. E. Payne and P. W. Schaefer, Spatial decay estimates in time-dependent Stokes flow,, SIAM J. Math. Anal., 24 (1993), 1395. Google Scholar
[2]	K. A. Ames and J. C. Song, Decay bounds for magnetohydrodynamic geophysical flow,, Nonlinear Analysis, 65 (2006), 1318. Google Scholar
[3]	S. Chiriţă and M. Ciarletta, Spatial behaviour of solutions in the plane Stokes flow,, J. Math. Anal. Appl., 277 (2003), 571. Google Scholar
[4]	C. O. Horgan, Plane steady flows and energy estimates for the Navier-Stokes equations,, Arch. Rat. Mech. Anal., 68 (1978), 359. Google Scholar
[5]	C. O. Horgan, Recent developments concerning Saint-Venant's principle: An update,, Appl. Mech. Rev., 42 (1989), 295. Google Scholar
[6]	C. O. Horgan, Recent developments concerning Saint-Venant's principle: A second update,, Appl. Mech. Rev., 49 (1996), 101. Google Scholar
[7]	C. O. Horgan and J. K. Knowles, Recent developments concerning Saint-Venant's principle,, in, (1983), 179. Google Scholar
[8]	C. O. Horgan and L. T. Wheeler, Spatial decay estimates for the Navier-Stokes equations with application to the problem of entry flow,, SIAM J. Appl. Math., 35 (1978), 97. Google Scholar
[9]	Y. Li, Y. Liu, S. Luo and C. Lin, Decay estimates for the Brinkman-Forchheimer equations in a semi-infinite pipe,, Z. Angew. Math. Mech., 92 (2012), 160. Google Scholar
[10]	C. Lin, Spatial decay estimates and energy bounds for the Stokes flow equations,, Stability Appl. Anal. Contin. Media, 2 (1992), 249. Google Scholar
[11]	C. Lin and L. E. Payne, Spatial decay bounds in the channel flow of an incompressible viscous fluid,, Math. Models Methods Appl. Sci., 14 (2004), 795. Google Scholar
[12]	R. Quintanilla, Spatial decay estimate for the hyperbolic heat equation, SIAM J., Math. Anal., 27 (1996), 78. Google Scholar
[13]	J. C. Song, Decay estimates for steady magnetohydrodynamic pipe flow,, Nonlinear Analysis, 54 (2003), 1029. Google Scholar
[14]	J. C. Song, Improved decay estimates in time-dependent Stokes flow,, J. Math. Anal. Appl., 288 (2003), 505. Google Scholar
[15]	J. C. Song, Improved spatial decay bounds in the plane Stokes flow,, Appl. Math. Mech., 30 (2009), 833. Google Scholar
[16]	J. C. Song, Spatial decay estimates in time-dependent double-diffusive flow,, J. Math. Anal. Appl., 267 (2001), 76. Google Scholar
[17]	B. Straughan, "Stability and Wave Motion in Porous Media,", Springer-Verlag, (2008). Google Scholar
[18]	P. Vafeades and C. O. Horgan, Exponential decay estimates for solutions of the van Kármán equations on a semi-infinite strip,, Arch. Rat. Mech. Anal., 104 (1988), 1. Google Scholar
[19]	A. Yoshizawa, "Hydrodynamic and Magnetohydrodynamic Turbulent Flows,", Kluwer Academic Publishers, (1998). Google Scholar
[20]	C. Zhao, Initial boundary value problem for the evolution system of MHD type describing geophysical flow in three dimensional domains,, Math. Meth. Appl. Sci., 26 (2003), 759. Google Scholar

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References:

[1]	K. A. Ames, L. E. Payne and P. W. Schaefer, Spatial decay estimates in time-dependent Stokes flow,, SIAM J. Math. Anal., 24 (1993), 1395. Google Scholar
[2]	K. A. Ames and J. C. Song, Decay bounds for magnetohydrodynamic geophysical flow,, Nonlinear Analysis, 65 (2006), 1318. Google Scholar
[3]	S. Chiriţă and M. Ciarletta, Spatial behaviour of solutions in the plane Stokes flow,, J. Math. Anal. Appl., 277 (2003), 571. Google Scholar
[4]	C. O. Horgan, Plane steady flows and energy estimates for the Navier-Stokes equations,, Arch. Rat. Mech. Anal., 68 (1978), 359. Google Scholar
[5]	C. O. Horgan, Recent developments concerning Saint-Venant's principle: An update,, Appl. Mech. Rev., 42 (1989), 295. Google Scholar
[6]	C. O. Horgan, Recent developments concerning Saint-Venant's principle: A second update,, Appl. Mech. Rev., 49 (1996), 101. Google Scholar
[7]	C. O. Horgan and J. K. Knowles, Recent developments concerning Saint-Venant's principle,, in, (1983), 179. Google Scholar
[8]	C. O. Horgan and L. T. Wheeler, Spatial decay estimates for the Navier-Stokes equations with application to the problem of entry flow,, SIAM J. Appl. Math., 35 (1978), 97. Google Scholar
[9]	Y. Li, Y. Liu, S. Luo and C. Lin, Decay estimates for the Brinkman-Forchheimer equations in a semi-infinite pipe,, Z. Angew. Math. Mech., 92 (2012), 160. Google Scholar
[10]	C. Lin, Spatial decay estimates and energy bounds for the Stokes flow equations,, Stability Appl. Anal. Contin. Media, 2 (1992), 249. Google Scholar
[11]	C. Lin and L. E. Payne, Spatial decay bounds in the channel flow of an incompressible viscous fluid,, Math. Models Methods Appl. Sci., 14 (2004), 795. Google Scholar
[12]	R. Quintanilla, Spatial decay estimate for the hyperbolic heat equation, SIAM J., Math. Anal., 27 (1996), 78. Google Scholar
[13]	J. C. Song, Decay estimates for steady magnetohydrodynamic pipe flow,, Nonlinear Analysis, 54 (2003), 1029. Google Scholar
[14]	J. C. Song, Improved decay estimates in time-dependent Stokes flow,, J. Math. Anal. Appl., 288 (2003), 505. Google Scholar
[15]	J. C. Song, Improved spatial decay bounds in the plane Stokes flow,, Appl. Math. Mech., 30 (2009), 833. Google Scholar
[16]	J. C. Song, Spatial decay estimates in time-dependent double-diffusive flow,, J. Math. Anal. Appl., 267 (2001), 76. Google Scholar
[17]	B. Straughan, "Stability and Wave Motion in Porous Media,", Springer-Verlag, (2008). Google Scholar
[18]	P. Vafeades and C. O. Horgan, Exponential decay estimates for solutions of the van Kármán equations on a semi-infinite strip,, Arch. Rat. Mech. Anal., 104 (1988), 1. Google Scholar
[19]	A. Yoshizawa, "Hydrodynamic and Magnetohydrodynamic Turbulent Flows,", Kluwer Academic Publishers, (1998). Google Scholar
[20]	C. Zhao, Initial boundary value problem for the evolution system of MHD type describing geophysical flow in three dimensional domains,, Math. Meth. Appl. Sci., 26 (2003), 759. Google Scholar

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