Correlation between Kolmogorov-Sinai entropy and self-diffusion coefficient in simple fluids.
The relationship between the Kolmogorov-Sinai entropy, h(KS) and the self-diffusion coefficient D is studied for two classical simple fluid systems with purely repulsive potentials (one system with a Wayne-Chandler-Anderson potential and the other with a hard-sphere potential). Numerical simulation data for h(KS) and D, normalized by the average collision frequency nu and the diameter of the particle sigma as natural units of time and distance, reveal that, in the region spanning from normal liquid up to near solidification (0.50< or =rho< or =0.93), the Kolmogorov-Sinai entropy has a power law dependeney on the self-diffusion coefficient of the form h(KS)/nu proportional, variant (D/sigma(2)nu)(eta), in which eta is independent of density and temperature.
Ihm
Dongchul
D
Department of Chemistry and School of Molecular Science (BK21), Korea Advanced Instititute of Science and Technology, 373-1 Gusongdong Yusonggu, Taejeon, Korea.
Shin
Young-Han
YH
Lee
Jae-Weon
JW
Lee
Eok Kyun
EK