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Asymptotic Behavior of the Navier-Stokes Equations with Nonzero Far-Field Velocity
Roh, Jaiok Ren, Weiqing
Abstract and Applied Analysis, 2011-01, Vol.2011 (2011)
[Revista revisada por pares]
Hindawi Limiteds
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Título:
Asymptotic Behavior of the Navier-Stokes Equations with Nonzero Far-Field Velocity
Autor:
Roh, Jaiok
Ren, Weiqing
Materias:
Engineering mathematics
;
Fluid mechanics
;
Navier-Stokes equations
;
Speed
Es parte de:
Abstract and Applied Analysis, 2011-01, Vol.2011 (2011)
Descripción:
Concerning the nonstationary Navier-Stokes flow with a nonzero constant velocity at infinity, the temporal stability has been studied by Heywood (1970, 1972) and Masuda (1975) in L2 space and by Shibata (1999) and Enomoto-Shibata (2005) in Lp spaces for p≥3. However, their results did not include enough information to find the spatial decay. So, Bae-Roh (2010) improved Enomoto-Shibata's results in some sense and estimated the spatial decay even though their results are limited. In this paper, we will prove temporal decay with a weighted function by using Lr-Lp decay estimates obtained by Roh (2011). Bae-Roh (2010) proved the temporal rate becomes slower by (1+σ)/2 if a weighted function is |x|σ for 0<σ<1/2. In this paper, we prove that the temporal decay becomes slower by σ, where 0<σ<3/2 if a weighted function is |x|σ. For the proof, we deduce an integral representation of the solution and then establish the temporal decay estimates of weighted Lp-norm of solutions. This method was first initiated by He and Xin (2000) and developed by Bae and Jin (2006, 2007, 2008).
Editor:
Hindawi Limiteds
Idioma:
Inglés
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