Khlybov Oleg A, Ryzhkov Ilya I, Lyubimova Tatyana P
Institute of Continuous Media Mechanics, UB RAS, Koroleva St. 1, 614013, Perm, Russia.
Eur Phys J E Soft Matter. 2015 Apr;38(4):29. doi: 10.1140/epje/i2015-15029-0. Epub 2015 Apr 28.
The paper is devoted to processing the data of DCMIX 1 space experiment. In this experiment, the Optical digital interferometry was used to measure the diffusion and Soret coefficients in the ternary mixture of 1,2,3,4-tetrahydronaphthalene, isobutylbenzene and n-dodecane at mass fractions of 0.8/0.1/0.1 and at 25°C. The raw interferometric images were processed to obtain the temporal and spatial evolution of refractive indices for two laser beams of different wavelengths. The method for extracting the diffusion and thermal diffusion coefficients originally developed for optical beam deflection was extended to optical digital interferometry allowing for the spatial variation of refractive index along the diffusion path. The method was validated and applied to processing the data for Soret and diffusion steps in 5 experimental runs. The obtained results for the Soret coefficients and one of the eigenvalues of diffusion matrix showed acceptable agreement within each step. The second eigenvalue was not determined with sufficient accuracy.
本文致力于处理DCMIX 1空间实验的数据。在该实验中，采用光学数字干涉测量法测量了质量分数为0.8/0.1/0.1的1,2,3,4-四氢萘、异丁基苯和正十二烷三元混合物在25°C时的扩散系数和索雷特系数。对原始干涉图像进行处理，以获得不同波长的两束激光的折射率的时间和空间演变。最初为光束偏转开发的提取扩散系数和热扩散系数的方法被扩展到光学数字干涉测量法，该方法考虑了沿扩散路径折射率的空间变化。该方法经过验证，并应用于处理5次实验运行中索雷特和扩散步骤的数据。在每个步骤中，获得的索雷特系数和扩散矩阵的一个特征值的结果显示出可接受的一致性。第二个特征值的确定精度不够。
