8th Liquid Matter Conference September 6-10, 2011 Wien, Austria ...

Tue 611:23-14:00P9.1Viscosity of substance at critical pointOleksander Alekhin, 1 Oksana Bilous, 2 Alla Kulinich, 1 Yuriy Ostapchuk, 1 andEvgenii Rudnikov 11 Taras Shevchenko National University of Kyiv, Faculty of Physics, Prosp. Glushkova, 4,03022, Kyiv, Ukraine2 National Aviation University, Kyiv, UkraineThe results of experimental studies of temperature dependence of the shear viscosity for the wideset of binary solutions near the critical consolute temperature, t = (T − T c )/T c , are presented inthe work. This data has been analyzed both on the basis of the known equation of the viscosityof the dynamic theory of critical phenomena [1] and the equations for viscosity proposed in [2],which considers the spatial dispersion of system near the critical temperature [3]. The results ofour experimental studies of the viscosity of the solutions (methanol-heptane, methanol-hexane,nitromethane-n-amyl alcohol) near the critical consolute temperature have been analyzed in thiswork. The literature data of the viscosity measurement of the solution 3-metilpirydin-heavy water(3MP-D 2 O), 3MP-D 2 O+NaCl and, melt In 80 Se 04 Te 16 were also analysed. It has been shownthat the equation of the fluctuation part of the viscosity [2], based on the work [3], adequatelydescribes the experimental data of the solution viscosity µ(t) in the entire temperature range thatwas investigated (t = 10 −2 − 10 −5 ) and gives finite value of the viscosity at t = 0.[1] P. C. Hohenberg, B. I. Halperin, Rev. Mod. Phys. 49, 435 (1977).[2] O. D. Alekhin, V. S. Sperkach, B. Zh. Abdikarimov, O. Bilous, UPhJ, 45(9), 1067 (2000).[3] M. Fixman, J. Chem. Phys, 36(2), 310 (1962).1