Investigation of the Soret effect in binary liquid mixtures by thermal-diffusion-forced Rayleigh scattering (contribution to the benchmark test)

• Published in: Philosophical magazine (2003. Print) Vol. 83; no. 17-18; pp. 1989 - 1999
• Main Authors: Leppla, C., Wiegand, S.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Abingdon Taylor & Francis Group 01.01.2003; Taylor and Francis
• Subjects: Brillouin and rayleigh scattering; other light scattering; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Physics; Thermal conduction in nonmetallic liquids; Transport properties of condensed matter (nonelectronic); Soret effect; Thermal diffusion; Liquid state; Tetralin; Data analysis; Rayleigh scattering; Dodecane; Interdiffusion; Experimental study; Binary mixtures; Benchmark calculation; Diffusion coefficient; Organic compounds
• ISSN: 1478-6435; 1478-6443
• DOI: 10.1080/0141861031000108222

Within the framework of an international benchmark test we have performed measurements of the transport coefficients S T (Soret coefficient), D (mutual diffusion coefficient) and D T (thermal diffusion coefficient) on the three binary organic liquid mixtures 1,2,3,4-tetrahydronaphthalene- n -dodecane, 1,2,3,4-tetra- hydronaphthalene-isobutylbenzene and isobutylbenzene- n -dodecane with the weight fraction c = 0.5 at T = 298.15 K by means of thermal-diffusion-forced Rayleigh scattering (TDFRS) for benchmarking purposes. Our results for the coefficients are in good agreement with those obtained by annular and parallelepipedic thermogravitational columns and by other benchmark tests which also apply TDFRS measurements.