High-contrast approximation for penetrable wedge diffraction
High-contrast approximation for penetrable wedge diffraction
复制标题
可穿透楔形衍射的高对比度近似
DOI:
10.1093/imamat/hxaa011
复制
发表时间:
2020
影响因子:
1.2
通讯作者:
Abrahams I
中科院分区:
文献类型:
--
作者:
Abrahams I
The important open canonical problem of wave diffraction by a penetrable wedge is considered in the high-contrast limit. Mathematically, this means that the contrast parameter, the ratio of a specific material property of the host and the wedge scatterer, is assumed small. The relevant material property depends on the physical context and is different for acoustic and electromagnetic waves for example. Based on this assumption, a new asymptotic iterative scheme is constructed. The solution to the penetrable wedge is written in terms of infinitely many solutions to (possibly inhomogeneous) impenetrable wedge problems. Each impenetrable problem is solved using a combination of the Sommerfeld–Malyuzhinets and Wiener–Hopf techniques. The resulting approximated solution to the penetrable wedge involves a large number of nested complex integrals and is hence difficult to evaluate numerically. In order to address this issue, a subtle method (combining asymptotics, interpolation and complex analysis) is developed and implemented, leading to a fast and efficient numerical evaluation. This asymptotic scheme is shown to have excellent convergent properties and leads to a clear improvement on extant approaches.
登录
查看更多内容
影响因子:
1.9
作者:
Assier R
通讯作者:
Assier R
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
B. Budaev;D. Bogy
通讯作者:
D. Bogy
影响因子:
1.4
作者:
F. Noether
通讯作者:
F. Noether
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
A. Sommerfeld
通讯作者:
A. Sommerfeld
影响因子:
3.7
作者:
V. Daniele;G. Lombardi;R. Zich
通讯作者:
R. Zich