平面波在三維完全匹配層中的傳播特性
PROPAGATION CHARACTERS OF PLANE WAVE IN THE PERFECTLY MATCHED LAYER
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摘要: 完全匹配層(PML)良好的吸波特性已成功地用于FDTD問(wèn)題。Katz給出了三維問(wèn)題分量場(chǎng)所滿足的12個(gè)微分方程,但未對(duì)波在PML中的傳播特性進(jìn)行討論。本文基于Katz的微分方程組,推導(dǎo)出了平面波解、波數(shù)及其阻抗。
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關(guān)鍵詞:
- 完全匹配層; 吸收邊界條件; 時(shí)域有限差分; 截?cái)嗝?/a>
Abstract: The Perfectly Matched Layer(PML)is very effective in absorbing propagating wave, so that it has been successfully applied in FDTD research. Katz(1994) derived 12 differential equations in three-dimensional PML, but there is no conclusion for the propagation characters of plane wave in PML such as wave expression ,wave number and wave impedance. These characters are investigated in this paper. -
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