ASYMPTOTIC APPROXIMATIONS FOR SOLUTIONS TO QUASILINEAR AND LINEAR PARABOLIC PROBLEMS WITH DIFFERENT PERTURBED BOUNDARYCONDITIONS IN PERFORATED DOMAINS

摘要

We consider quasilinear and linear parabolic problems with rapidly oscillating coefficients in a domain Cl£ that is e-periodically perforated by small holes of order G{e). The holes are divided into three e-periodical sets depending on boundary conditions. The homogeneous Dirichlet boundary conditions are imposed for holes of one set, whereas, for holes in the remaining sets, different inhomogeneous Neumann and nonlinear Robin boundary conditions involving additional perturbation parameters are imposed. For a solution to the quasilinear problem we find the leading terms of the asymptotic expansion and prove asymptotic estimates that show the influence of perturbation parameters. In the linear case, we construct and justify a complete asymptotic expansion of the solution by using the two-scale asymptotic expansion method. Bibliography: 25 titles. Illustrations: 1 figure.