Condensed Matter Physics, 1999, vol. 2, No. 1(17), p. 37-51, English
DOI:10.5488/CMP.2.1.37

Title: CALCULATION OF TRANSPORT COEFFICIENTS DISPERSION AND A DYNAMIC STRUCTURE FACTOR OF SIMPLE LIQUID
Authors: V.V.Ignatyuk {Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 290011 Lviv, Ukraine)

The dynamic structure factor and the dispersion of transport coefficients are calculated for a simple liquid on the basis of the Fokker-Planck equation for a nonequilibrium distribution function of collective variables. The mode-coupling theory is used to obtain a closed chain of equations for wave-vector-($\bv k$) and frequency-($\omega$) dependent transport coefficients. It is shown that in the intermediate region of $\bv k$ the relations of nonlocal thermodynamics give more reliable results, while in the case of small wave-number values one could restrict oneself by local thermodynamics. An analysis of the sound mode is performed and the coefficient at $k^{5/2}$ for a sound frequency dispersion is calculated. The obtained results are compared with both the experimental data and computer simulation.

Comments: Figs. 3, Refs. 29, Tabs. 0.

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