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国际多尺度计算工程期刊
影响因子: 1.016 5年影响因子: 1.194 SJR: 0.554 SNIP: 0.82 CiteScore™: 2

ISSN 打印: 1543-1649
ISSN 在线: 1940-4352

国际多尺度计算工程期刊

DOI: 10.1615/IntJMultCompEng.v8.i2.60
pages 207-219

Analysis of Multi-Transmitting Formula for Absorbing Boundary Conditions

Xianming Wang
Zhou Peiyuan Center for Applied Mathematics, Tsinghua University, Beijing 100084, China
Shaoqiang Tang
Center for Applied Physics and Technology, and LTCS, College of Engineering, Peking University, Beijing 100871; Zhou Peiyuan Center for Applied Mathematics, Tsinghua University, Beijing 100084, China

ABSTRACT

In this paper, we analyze the multi-transmitting formula (MTF) proposed by Liao andWong (1984). From the computed reflection coefficients for the fully discrete MTF boundary conditions, we suggest choices for the artificial wave propagation speed which are different from Liao’s original choice. Theoretical and numerical studies for various incidence angles demonstrate that the suggested choices effectively reduce spurious reflections.

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