Brownian motion in a fluid close to its' critical point

P. Mazur and G. van der Zwan

Physica A: Statistical Mechanics and its Applications, 1978, vol. 92, issue 3, 483-500

Abstract: The frequency dependent friction coefficient of a spherical Brownian particle of radius a in a compressible fluid close to its critical point is evaluated taking into account the large correlation length ζ of the density fluctuations in the fluid. The expression found depends for finite frequencies on the ratio a/Gx. It is furthermore shown that a negative contribution to the amplitude of the usual t−3/2 long time tail of the velocity autocorrelation function of the particle appears very close to the critical point when ζ ⪢ a.

Date: 1978
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Citations: View citations in EconPapers (9)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:92:y:1978:i:3:p:483-500

DOI: 10.1016/0378-4371(78)90147-4

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