Adaptive generalized multiscale finite element methods for H(curl)-elliptic problems with heterogeneous coefficients
For computational scientists solving electromagnetic problems in heterogeneous media, this method provides an adaptive approach that reduces computational cost while maintaining accuracy.
The paper develops an adaptive multiscale finite element method for H(curl)-elliptic problems in heterogeneous media, achieving robust convergence with respect to media contrast and heterogeneities, as demonstrated by numerical results.
In this paper, we construct an adaptive multiscale method for solving H(curl)-elliptic problems in highly heterogeneous media. Our method is based on the generalized multiscale finite element method. We will first construct a suitable snapshot space, and a dimensional reduction procedure to identify important modes of the solution. We next develop and analyze an a posteriori error indicator, and the corresponding adaptive algorithm. In addition, we will construct a coupled offline-online adaptive algorithm, which provides an adaptive strategy to the selection of offline and online basis functions. Our theory shows that the convergence is robust with respect to the heterogeneities and contrast of the media. We present several numerical results to illustrate the performance of our method.