Long time decay to the Leray solution of the two‐dimensional Navier–Stokes equations
Long time decay to the Leray solution of the two‐dimensional Navier–Stokes equations
复制标题
二维纳维-斯托克斯方程 Leray 解的长时衰减
DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
R. Selmi
中科院分区:
文献类型:
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作者:
J. Benameur;R. Selmi
We give a new proof of the zero limit to the solution of the two‐dimensional Navier–Stokes equations, as time goes to infinity. This proof is done in the frequency space; it is simpler and shorter compared to the existing proofs. Based on this limit, we derive some analytic properties of the solution. Mainly, it becomes infinitely differentiable with respect to time and has value in all Sobolev spaces. Moreover, its regularity grows in an exponential way and its L2(R2) norm decays exponentially fast, as time tends to infinity. Especially, we obtain, for any time t⩾0, that ∫ξe(1/2)νt|ξ||ℱ(u)(t, ξ)|2 dξ ⩽ ‖u(t/2)‖L2(R2)2. We describe the long time behaviour of its homogeneous Sobolev norm for any positive, real exponent, by comparing to usual functions and we ameliorate some existing results. We establish that the Leray solution is stable as time increases.
影响因子:
2.4
作者:
R. Farwig;H. Kozono
通讯作者:
H. Kozono