Manifestation of the collective effects in the rotational motion of molecules in liquids

✍ Scribed by T.V. Lokotosh; N.P. Malomuzh

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 467 KB
• Volume: 93
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/s0167-7322(01)00214-8

✦ Synopsis

The Lagrange approach to the theory of thermal hydrodynamic fluctuations is developed. The rotational motion of a Lagrange particle is studied in detail. The apparent expression for the angular velocity autocorrelation function (AVACF) at arbitrary times is derived. The obtained results are used to explain the specificity of the behaviour of the AVACF for a molecule. The collective contribution to the rotational self-diffusion coefficient as well as the manifestation of collective effects in the frequency dispersion of the dielectric permitlivity are discussed. The peculiarities of the AVACF for two-dimensional liquids are considered.