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H-convergence of a class of quasilinear equations in perforated domains beyond periodic setting
Arabian Journal of Mathematics ( IF 0.9 ) Pub Date : 2021-02-06 , DOI: 10.1007/s40065-021-00314-4
Hamid Haddadou

In this paper, we aim to study the asymptotic behavior (when \(\varepsilon \;\rightarrow \; 0\)) of the solution of a quasilinear problem of the form \(-\mathrm{{div}}\;(A^{\varepsilon }(\cdot ,u^{\varepsilon }) \nabla u^{\varepsilon })=f\) given in a perforated domain \(\Omega \backslash T_{\varepsilon }\) with a Neumann boundary condition on the holes \(T_{\varepsilon }\) and a Dirichlet boundary condition on \(\partial \Omega \). We show that, if the holes are admissible in certain sense (without any periodicity condition) and if the family of matrices \((x,d)\mapsto A^{\varepsilon }(x,d)\) is uniformly coercive, uniformly bounded and uniformly equicontinuous in the real variable d, the homogenization of the problem considered can be done in two steps. First, we fix the variable d and we homogenize the linear problem associated to \(A^{\varepsilon }(\cdot ,d)\) in the perforated domain. Once the \(H^{0}\)-limit \(A^{0}(\cdot ,d)\) of the pair \((A^{\varepsilon },T^{\varepsilon })\) is determined, in the second step, we deduce that the solution \(u^{\varepsilon }\) converges in some sense to the unique solution \(u^{0}\) in \(H^{1}_{0}(\Omega )\) of the quasilinear equation \(-\mathrm{{div}}\;(A^{0}(\cdot ,u^{0})\nabla u )=\chi ^{0}f\) (where \( \chi ^{0}\) is \(L^{\infty }\) weak \(^{\star }\) limit of the characteristic function of the perforated domain). We complete our study by giving two applications, one to the classical periodic case and the second one to a non-periodic one.



中文翻译:

一类拟线性方程在周期域之外的穿孔域的H-收敛性

本文旨在研究形式为\(-\ mathrm {{div}} \;()的拟线性问题解的渐近行为(当\(\ varepsilon \; \ rightarrow \; 0 \)时甲^ {\ varepsilon}(\ CDOT中,u ^ {\ varepsilon})\ nablaÚ^ {\ varepsilon})= F \)在穿孔域给出\(\欧米茄\反斜杠Ť_ {\ varepsilon} \)与孔\(T _ {\ varepsilon} \)的Neumann边界条件和\(\ partial \ Omega \)的Dirichlet边界条件。我们证明,如果孔在某种意义上是允许的(没有任何周期性条件),并且矩阵族\((x,d)\ mapsto A ^ {\ varepsilon}(x,d)\)在实变量d中是一致矫顽的,一致有界的和一致等连续的,所考虑问题的均化可以分两步完成。首先,我们固定变量d,并在穿孔域中均化与\(A ^ {\ varepsilon}(\ cdot,d)\)相关的线性问题。一旦对\((A ^ {\ varepsilon},T ^ {\ varepsilon})\)对中的\(H ^ {0} \)- limit \(A ^ {0}(\ cdot,d )\)被确定,在第二步骤中,我们推断出溶液\(U ^ {\ varepsilon} \)在某种意义上,以独特的解收敛\(U ^ {0} \)\(H ^ {1} _ { 0}(\ Omega)\)的拟线性方程\(-\ mathrm {{div}} \;(A ^ {0}(\ cdot,u ^ {0})\ nabla u)= \ chi ^ {0} f \)(其中\(\ chi ^ { 0} \)是穿孔区域特征函数的\(L ^ {\ infty} \)\(^ {\ star} \)极限)。我们通过给出两种应用来完成我们的研究,一种适用于经典周期性情况,另一种适用于非周期性情况。

更新日期:2021-02-07
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