G. Costantini, A. Puglisi, and U. Marconi. Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)
Abstract
We show by numerical simulations that a non rotationally symmetric
body, whose orientation is fixed and whose center of mass can slide
along a rectilinear guide, under the effect of inelastic collisions
with a surrounding gas of particles, displays directed motion. We
present a theory which explains how the lack of time reversal induced
by the inelasticity of collisions can be exploited to generate a
steady average drift. In the limit of an heavy ratchet, we derive an
effective Langevin equation whose parameters depend on the microscopic
properties of the system and obtain a fairly good quantitative
agreement between the theoretical predictions and simulations
concerning mobility, diffusivity and average velocity.
%0 Book Section
%1 statphys23_0155
%A Costantini, G.
%A Puglisi, A.
%A Marconi, U. Marini Bettolo
%B Abstract Book of the XXIII IUPAP International Conference on Statistical Physics
%C Genova, Italy
%D 2007
%E Pietronero, Luciano
%E Loreto, Vittorio
%E Zapperi, Stefano
%K granular non-equilibrium ratchet statphys23 topic-7
%T A Granular Brownian Ratchet Model
%U http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=155
%X We show by numerical simulations that a non rotationally symmetric
body, whose orientation is fixed and whose center of mass can slide
along a rectilinear guide, under the effect of inelastic collisions
with a surrounding gas of particles, displays directed motion. We
present a theory which explains how the lack of time reversal induced
by the inelasticity of collisions can be exploited to generate a
steady average drift. In the limit of an heavy ratchet, we derive an
effective Langevin equation whose parameters depend on the microscopic
properties of the system and obtain a fairly good quantitative
agreement between the theoretical predictions and simulations
concerning mobility, diffusivity and average velocity.
@incollection{statphys23_0155,
abstract = {We show by numerical simulations that a non rotationally symmetric
body, whose orientation is fixed and whose center of mass can slide
along a rectilinear guide, under the effect of inelastic collisions
with a surrounding gas of particles, displays directed motion. We
present a theory which explains how the lack of time reversal induced
by the inelasticity of collisions can be exploited to generate a
steady average drift. In the limit of an heavy ratchet, we derive an
effective Langevin equation whose parameters depend on the microscopic
properties of the system and obtain a fairly good quantitative
agreement between the theoretical predictions and simulations
concerning mobility, diffusivity and average velocity.},
added-at = {2007-06-20T10:16:09.000+0200},
address = {Genova, Italy},
author = {Costantini, G. and Puglisi, A. and Marconi, U. Marini Bettolo},
biburl = {https://www.bibsonomy.org/bibtex/20cea329358f04e4c32d3fe8916b5b137/statphys23},
booktitle = {Abstract Book of the XXIII IUPAP International Conference on Statistical Physics},
editor = {Pietronero, Luciano and Loreto, Vittorio and Zapperi, Stefano},
interhash = {9bce9f8f01d4d87a7bc89272320d0495},
intrahash = {0cea329358f04e4c32d3fe8916b5b137},
keywords = {granular non-equilibrium ratchet statphys23 topic-7},
month = {9-13 July},
timestamp = {2007-06-20T10:16:13.000+0200},
title = {A Granular Brownian Ratchet Model},
url = {http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=155},
year = 2007
}