| 光散射粒度测量中Mie理论两种改进的数值计算方法 |
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| 引用本文： | 王式民,朱震,叶茂,陆勇,陆永刚,徐益谦. 光散射粒度测量中Mie理论两种改进的数值计算方法[J]. 计量学报, 1999, 20(4): 279-285 |
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| 作者姓名： | 王式民 朱震 叶茂 陆勇 陆永刚 徐益谦 |
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| 作者单位： | 东南大学热能工程研究所 |
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| 摘 要： | 本提出了两种Ｍｉｅ散射程序算法：改进连分式方法和修正倒推法。改进连分式方法对Ｌｅｎｔｚ提出的连分式数值计算方法进行了改进，ｉｅ程序的计算范围大大拓宽；颗粒当量直径达到１０＾５，折射率虚部绝对值达到１０＾５。解决了以往一些算法不稳定的现象。
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| 关 键 词： | Mie散射计算 粒度测量 数值计算 光散射 |
Two Improved Numerical Algorithms of Mie Theory in the Particle Sizing by Light Scattering Method |
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| Wang Shimin,Zhu Zhen,Ye Mao,Lu Yong,Lu Yonggang,Xu Yiqian. Two Improved Numerical Algorithms of Mie Theory in the Particle Sizing by Light Scattering Method[J]. Acta Metrologica Sinica, 1999, 20(4): 279-285 |
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| Authors: | Wang Shimin Zhu Zhen Ye Mao Lu Yong Lu Yonggang Xu Yiqian |
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| Affiliation: | Wang Shimin, Zhu Zhen, Ye Mao, LuYong, Lu Yonggang, Xu Yiqian;(Thermal Energy Research Institute, Southeast University, Nanjing 210096) |
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| Abstract: | Two improved Mie scattering numerical algorithms are presented in this paper, which are Improved Continued Fraction Method(ICFM) and Modified Downward Recurrence Method(MDRM). In ICFM, the Bessel function is calculated by using the way proposed by Lentz to broaden the calculative range very much: size parameter up to 10 5, the imaginary part of the refractive index large to 10 5. ICFM solves the problem of unstable recurrence. MDRM decreases the calculative time considerably and is a very practical method. According to results given in this paper, each method has its own advantage and is available in different cases. |
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| Keywords: | Mie scattering calculation Particle sizing |
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