
Accession Number : AD0696984
Title : THEORY OF DIELECTRIC RELAXATION IN POLAR LIQUIDS.
Descriptive Note : Technical note,
Corporate Author : MARYLAND UNIV COLLEGE PARK INST FOR FLUID DYNAMICS AND APPLIED MATHEMATICS
Personal Author(s) : Nee,TsuWei ; Zwanzig,Robert
Report Date : SEP 1969
Pagination or Media Count : 53
Abstract : The theory of dielectric relaxation in a model polar liquid is developed and applied to experimental data. The model is a spherical Onsager cavity, with a uniform dielectric background described by the high frequency limit dielectric constant, and containing a permanent point dipole. The dipole moment undergoes rotational Brownian motion in the cavity. Dielectric friction on the rotating dipole is taken into account, and leads to a frequency dependent relaxation time. Earlier theoretical results, obtained first by Klug, Kranbuehl, and Vaughn, and by Fatuzzo and Mason, are rederived. When the rotational Brownian motion is spherically isotropic, approximate Debye relaxation is found. When the rotational Brownian motion of the dipole is restricted to a constant angle with respect to some fixed axis, approximate DavidsonCole relaxation is found. Experimental data on glycerol and iamyl bromide are analyzed this way. (Author)
Descriptors : (*LIQUIDS, *DIELECTRIC PROPERTIES), (*DIFFUSION, DIELECTRIC PROPERTIES), ALKANES, RELAXATION TIME, DIPOLE MOMENTS, GLYCEROLS, BROMINE COMPOUNDS, ORGANIC SOLVENTS, FLUID DYNAMICS
Subject Categories : Physical Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE