报告题目：On the freezing density scaling of transport coefficients in simple fluids
报告人：Professor Sergey Khrapak
Joint Institute for High Temperatures, Russian Academy of Sciences in Moscow
报告摘要：It is demonstrated that properly reduced transport coefficients (self-diffusion, shear viscosity, and thermal conductivity) of the Lennard-Jones liquid along isotherms exhibit quasi-universal scaling on the density divided by its value at the freezing point. This finding is rationalized in terms of Rosenfeld’s excess entropy scaling and isomorph theory of Roskilde-simple systems. The observed scaling is closely related to the density scaling of transport coefficients of hard-sphere fluids. It is further demonstrated that the freezing density scaling operates reasonably well for viscosity and thermal conductivity coefficients of liquid argon, krypton, and xenon. Quasi-universality of the reduced transport coefficients at their minima and at freezing conditions is briefly discussed.
报告人简介：Prof. Sergey Khrapak received the M.Sc. and Ph.D. degrees in physics from the Moscow Institute of Physics and Technology, Moscow, in 1996 and 1999, respectively. From 1996 to 2000, he was a Research Fellow with the Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow. From 2000 to 2014, he was with the Theory (complex plasma) Group at Max-Planck-Institute for Extraterrestrial Physics, Garching, Germany. From 2014 to 2021, he was with the Complex Plasma Group at German Aerospace Centre (DLR), Wessling, Germany. From 2015 to 2018 he was also appointed as a Chair of Excellence at PIIM Laboratory, Aix-Marseille-University, Marseille, France. He is currently affiliated with the Joint Institute for High Temperatures, Russian Academy of Sciences in Moscow. He is the author of more than 200 scientific papers. His current scientific interests are mostly focused on the theory of complex (dusty) plasmas and related soft condensed matter systems, as well as on thermodynamics and transport properties of fluids.