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arXiv 0812.4788math.AP
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边界层修正量的渐近分析及其应用

Asymptotic Analysis of Boundary Layer Correctors and Applications

D. Onofrei, B. Vernescu

摘要:

本文推广了Onofrei和Vernescu [ \textit{Asymptotic Analysis, 54, 2007, 103-123} ]中的思想,引入了适当的二阶边界层修正,研究了均匀化中经典问题的$H^1$ -模误差估计.先前的二阶边界层结果假设足够光滑的系数(这等效于假设足够光滑的校正器$χ_j,χ_{ij}\in W^{1,\infty}$)或光滑的均匀化解$u_0$,以获得阶数$\displaystyle O(ε^{\frac{3}{2}})$的估计。为此,我们使用由Cioranescu,Damlamian和Griso [ \textit{C. R. Acad. Sci. Paris, Ser. I 335, 2002, 99-104} ]开发的周期性展开方法。我们证明了在二维空间中,对于非光滑系数和一般数据,可以得到阶$\displaystyle O(ε^\frac{3}{2})$的估计。在三维中,假设$χ_j,χ_{ij}\in W^{1,p}$和$p>3$,可以获得相同的估计。我们还讨论了在非光滑系数的情况下,我们的结果如何推广了T.Hou等人[ \textit{ J. of Comp. Phys., 134, 1997, 169-189} ]提出的有限元多尺度方法的收敛性证明和Vogelius等人得到的复合介质第一特征值的一阶校正分析。[ \textit{Proc. Royal Soc. Edinburgh, 127A, 1997, 1263-1299} ].

英文摘要:

In this paper we extend the ideas presented in Onofrei and Vernescu [\textit{Asymptotic Analysis, 54, 2007, 103-123}] and introduce suitable second order boundary layer correctors, to study the $H^1$-norm error estimate for the classical problem in homogenization. Previous second order boundary layer results assume either smooth enough coefficients (which is equivalent to assuming smooth enough correctors $χ_j,χ_{ij}\in W^{1,\infty}$), or smooth homogenized solution $u_0$, to obtain an estimate of order $\displaystyle O(ε^{\frac{3}{2}})$. For this we use the periodic unfolding method developed by Cioranescu, Damlamian and Griso [\textit{C. R. Acad. Sci. Paris, Ser. I 335, 2002, 99-104}]. We prove that in two dimensions, for nonsmooth coefficients and general data, one obtains an estimate of order $\displaystyle O(ε^\frac{3}{2})$. In three dimenssions the same estimate is obtained assuming $χ_j,χ_{ij}\in W^{1,p}$, with $p>3$. We also discuss how our results extend, in the case of nonsmooth coefficients, the convergence proof for the finite element multiscale method proposed by T.Hou et al. [\textit{ J. of Comp. Phys., 134, 1997, 169-189}] and the first order correctoranalysis for the first eigenvalue of a composite media obtained by Vogelius et al.[\textit{Proc. Royal Soc. Edinburgh, 127A, 1997, 1263-1299}].

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