抄録
Diffusion coefficient and Soret coefficient are important for understanding mass transfer in fluid mixtures. In the present study, we have developed the theory for measurement of cross diffusion coefficient and Soret coefficient in ternary fluid mixtures by Soret Forced Rayleigh Scattering (SFRS) method. In this measuring principle, two probing lasers of different wavelength are used. Difference of compositional dependence of the refractive index (∂n/∂c_i) by wavelength causes two different signals. This enables analysis for obtaining four diffusion coefficients and two Soret coefficients in ternary solution. ∂n/∂c_i and ∂n/∂T of mixture with n-Dodecane, Isobutylbenzene, and 1,2,3,4-Tetrahydronaphthalene (equal mass fraction) have been measured.
