Measurement of index of refraction for multicomponent fluid mixtures

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Diffusion is the general term used to describe the motion of one species with respect to the other. Various causes may produce this relative motion. For instance, the composition inhomogeneities can lead to isothermal molecular diffusion. Diffusion plays an important role in many industrial processes, such as fluid separation, distillation, drying and coating processes, crystal growth, material processing and oil and gas extraction from tar sand and deep reservoir. Accurate diffusion experiments are of great importance in the control and the optimization of diffusion-dominant industrial processes. The measured data will be compared with the newly developed theory in order to better characterize the existing diffusion theories for terrestrial application.