Local absorbing boundaries of elliptical shape for scalar wave propagation in a half-plane
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- 作者：Lee ; Sanghoon ; Kallivokas ; Loukas F.
- 关键词：Absorbing boundary conditions ; Half-space or half-plane ; Scalar wave equation ; Elliptical shape ; Time-domain ; Frequency-domain
- 刊名：Finite Elements in Analysis and Design
- 出版年：2004
- 出版时间：September, 2004
- 年：2004
- 卷：40
- 期：15
- 页码：2063-2084
- 全文大小：489 K
文摘
We have recently discussed the performance of local second-order two-dimensional absorbing boundary conditions of elliptical shape for scattering and radiation problems involving sound-hard obstacles embedded in a full-plane. In this article, using the method of images, we extend the applicability of elliptically shaped truncation boundaries to semi-infinite acoustic media. For problems in either the time- or the frequency-domains, involving near-surface structures of elongated cross-sections, we show that significant computational savings are attainable when compared against semi-circular truncation geometries.