DIFFUSION AND SORET IN TERNARY MIXTURES. PREPARATION OF DCMIX_2 EXPERIMENT ON THE ISS

摘要

The experimental studies of the thermodiffusion in ternary mixtures are in an early stage andthe first results display that the Soret coefficients measured by different technique on the grounddiffer not only in values but even in signs. European scientists expect to obtain reliable benchmarkresults on the ISS for validation of ground experiments. Instrument SODI on the ISS is equippedwith two-wave length diagnostic which enables to measure Soret and diffusion coefficients in ternarymixtures. The procedure for the selection of the test mixture and its compositions is discussed.