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arXiv 0806.2187math.AP
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有孔区域中一类非线性边界多相干扰边值问题的渐近分析

Asymptotic analysis of a boundary-value problem with the nonlinear boundary multiphase interactions in a perforated domain

Taras A. Mel'nyk, Olena A. Sivak

摘要:

研究了具有快速振荡系数的二阶椭圆型微分算子在$ε-$周期穿孔区域$Ω_ε$中的边值问题.根据孔表面的边界相互作用,将孔划分为两个$ε-$周期集。因此,在小孔的相应边界上给出了两种不同的非线性Robin边界条件$σ_ε(u_ε) + εκ_{m} (u_ε) = εg^{(m)}_ε, m=1, 2,$。对该问题作了$ε\to0,$式的渐近分析,即在不使用扩张算子的情况下,证明了解和能量积分的收敛定理,构造了解和能量积分的渐近逼近,并得到了相应的误差估计.

英文摘要:

We consider a boundary-value problem for the second order elliptic differential operator with rapidly oscillating coefficients in a domain $Ω_ε$ that is $ε-$periodically perforated by small holes. The holes are divided into two $ε-$periodical sets depending on the boundary interaction at their surfaces. Therefore, two different nonlinear Robin boundary conditions $σ_ε(u_ε) + εκ_{m} (u_ε) = εg^{(m)}_ε, m=1, 2,$ are given on the corresponding boundaries of the small holes. The asymptotic analysis of this problem is made as $ε\to0,$ namely the convergence theorem both for the solution and for the energy integral is proved without using extension operators, the asymptotic approximations both for the solution and for the energy integral are constructed and the corresponding error estimates are obtained.

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