Optical measurement of concentration-dependent diffusion coefficients of binary solution using an asymmetric liquid-core cylindrical lens
Optical measurement of concentration-dependent diffusion coefficients of binary solution using an asymmetric liquid-core cylindrical lens
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使用不对称液芯柱面透镜光学测量二元溶液的浓度依赖性扩散系数
DOI：
10.1016/j.optlaseng.2019.105867
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发表时间：
2020-03
影响因子：
4.6
通讯作者：
Pu Xiaoyun
中科院分区：
文献类型：
--
作者：
Wei Li;Meng Weidong;Chen Yan;He Bo;Zhou Qing;Pu Xiaoyun
An optical method for measuring concentration-dependent diffusion coefficients of binary solution is introduced in this paper. The concentration spatial and temporal profiles (Ce(z, t)s) are obtained from a single experiment using an asymmetric liquid-core cylindrical lens. The concentration-dependent diffusion coefficient is assumed to be a polynomialD(C) =D0× (1 +α1C+α2C2+α3C3+ …), whereD0is diffusion coefficient in infinite dilute solution,α1,α2andα3are under-determined parameters. The finite difference method (FDM) is applied to solve numerically Fick diffusion equation, the calculated concentration profiles (Cn(z, t)s) by varying the under-determined parameters are compared with the profileCe(z, t), the parameters(α1,α2,α3, …) corresponding the minimum concentration standard deviation are selected to determineD(C). To verify the proposed method, we have carried out the diffusion experiment of ethylene glycol aqueous solution, the obtained concentration-dependent diffusion coefficients are in good agreement with literature values. On the other hand, the obtained polynomialD(C) has been used to calculate refractive index profiles (nn(z, t)s). Based on thenn(z, t)s, ray tracing method has been applied to simulate the diffusion images, which fit the experimental images very well over a wider range of diffusion time, demonstrating that the proposed method is reliable in rapidly measuring concentration-dependent liquid diffusion coefficients with high accuracy and stability.
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影响因子：
1.9
作者：
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影响因子：
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作者：
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DOI：
10.1088/0031-9112/7/10/004
发表时间：
2011-09
期刊：
Physics Bulletin
影响因子：
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作者：
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通讯作者：
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DOI：
10.5860/choice.35-0927
发表时间：
1984-05
期刊：
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影响因子：
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