Rotational velocity autocorrelation function of interacting Brownian particles

B Cichocki and B.u Felderhof

Physica A: Statistical Mechanics and its Applications, 2001, vol. 289, issue 3, 409-418

Abstract: Recently, Hagen, Frenkel and Lowe [Physica A 272 (1999) 376] have obtained interesting simulation data for the rotational velocity autocorrelation function of a selected particle in a dense suspension of interacting spherical Brownian particles. Although a wide time interval was studied, it was found that the correlation function had not yet settled down to its t−5/2 long-time tail at the longest time considered. In the following analysis, the method of Padé approximants is applied to the Laplace transform of the correlation function. A different value for the coefficient of the long-time tail is obtained than found by Hagen et al. by extrapolation. A prediction is made for the behavior of the correlation function outside the range of presently available data.

Keywords: Colloidal suspensions; Brownian motion; Long-time tail (search for similar items in EconPapers)
Date: 2001
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:289:y:2001:i:3:p:409-418

DOI: 10.1016/S0378-4371(00)00532-X

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