コンテンツメニュー

Ueda Masahiko

Affiliate Master Yamaguchi University

Suppression of thermal noise in non-Markovian random velocity field

Journal of Statistical Mechanics: Theory and Experiment Volume 2016 Page 023206-
published_at 2016-02-25
2022-5-31-14-44rvf_151124iop.pdf
[fulltext] 153 KB
Title
Suppression of thermal noise in non-Markovian random velocity field
Abstract
We study the diffusion of Brownian particles in a Gaussian random velocity field with short memory. By extending the derivation of an effective Fokker–Planck equation for the Lanvegin equation with weakly colored noise to a random velocity-field problem, we find that the effect of thermal noise on particles is suppressed by the existence of memory. We also find that the renormalization effect for the relative diffusion of two particles is stronger than that for single-particle diffusion. The results are compared with those of molecular dynamics simulations.
Creators Ueda Masahiko
Affiliate Master Yamaguchi University
[kakenhi]15501 grid.268397.1
Source Identifiers [EISSN] 1742-5468
Creator Keywords
Diffusion Non-Markovian process Fokker–Planck equation
Languages eng
Resource Type departmental bulletin paper
Publishers IOP Publishing
Date Issued 2016-02-25
Rights
© 2016 IOP Publishing Ltd and SISSA Medialab srl()
File Version Accepted Manuscript
Access Rights open access
Relations
[isVersionOf] https://doi.org/10.1088/1742-5468/2016/02/023206
Funding Refs
Japan Society for the Promotion of Science
Award Nonequilibrium dynamics of soft matter and information