Late-time Instability for UPML and Periodic Boundary in Elongated Multilayer Thin Plate Simulations
Loading...
Date
2019-04
Authors
Li, Huiping
Wang, Yi
Cao, Qunsheng
ORCID
Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Společnost pro radioelektronické inženýrství
Altmetrics
Abstract
In this article, we examine the late-time instability properties of hybrid boundary conditions in the discontinuous Galerkin time-domain (DGTD) simulations of an elongated multilayer thin plate. The hybrid boundary is combined by uniaxial perfectly matched layer (UPML) and periodic boundary condition (PBC). Herein, the PBC is employed to approximate an infinite long target. For the target studied, when implementing the UPML within the discrete DGTD domain, late-time instabilities would occur. These instable or spurious information can severely corrupt the solution of a physical problem in time domain. To suppress them, two effective ways are proposed, i.e., increasing the size of the air space (the distance away from the interface between the target studied and the UPML) and decreasing the conductivity of the UPML. The numerical experiments verify that the instability characteristics can be efficiently attenuated by proposed two methods in this paper.
Description
Citation
Radioengineering. 2019 vol. 28, č. 1, s. 108-113. ISSN 1210-2512
https://www.radioeng.cz/fulltexts/2019/19_01_0108_0113.pdf
https://www.radioeng.cz/fulltexts/2019/19_01_0108_0113.pdf
Document type
Peer-reviewed
Document version
Published version
Date of access to the full text
Language of document
en