Journal article
SCATTERING BY A BOUNDED HIGHLY OSCILLATING PERIODIC MEDIUM AND THE EFFECT OF BOUNDARY CORRECTORS
SIAM journal on applied mathematics, v 79(4), pp 1448-1474
01 Jan 2019
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We study the homogenization of a transmission problem arising in the scattering theory for bounded inhomogeneities with periodic coefficient in the lower-order term of the Helmholtz equation. The squared index of refraction is assumed to be a periodic function of the fast variable, specified over the unit cell with characteristic size epsilon. We obtain improved convergence results that assume lower regularity than previous estimates (which also allow for periodicity in the second-order operator), and we describe the asymptotic behavior of boundary correctors for general domains at all orders. In particular we show that, in contrast to Dirichlet problems, the O(epsilon) boundary corrector is nontrivial and can be observed in the far field. We further demonstrate the latter far field effect is larger than that of the "bulk" corrector-the so-called periodic drift, which is found to emerge only at O(epsilon(2)). We illustrate the analysis by examples in one and two spatial dimensions.
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Details
- Title
- SCATTERING BY A BOUNDED HIGHLY OSCILLATING PERIODIC MEDIUM AND THE EFFECT OF BOUNDARY CORRECTORS
- Creators
- Fioralba Cakoni - Rutgers, The State University of New JerseyBojan B. Guzina - Civil, Environmental, and Geo- EngineeringShari Moskow - Drexel UniversityTayler Pangburn - Drexel University
- Publication Details
- SIAM journal on applied mathematics, v 79(4), pp 1448-1474
- Publisher
- Siam Publications
- Number of pages
- 27
- Grant note
- DMS-1715425; DMS-1813492 / NSF; National Science Foundation (NSF) FA9550-13-1-0199 / AFOSR; United States Department of Defense; Air Force Office of Scientific Research (AFOSR) 10-862 / DOE NEUP; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mathematics
- Web of Science ID
- WOS:000483938900014
- Scopus ID
- 2-s2.0-85072014367
- Other Identifier
- 991019167972704721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Mathematics, Applied