Linked Life Data

17155263

Source:http://linkedlifedata.com/resource/pubmed/id/17155263

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
14
pubmed:dateCreated
2006-12-12
pubmed:abstractText
The persistence of ratchet effects, i.e., nonzero mass flux under a zero-mean time-dependent drive, when many-body interactions are present, is studied via molecular dynamics (MD) simulations of a simple liquid flowing in an asymmetric nanopore. The results show that (i) ratchet effects persist under many-body density correlations induced by the forcing; (ii) two distinct linear responses (flux proportional to the drive amplitude) appear under strong loads. One regime has the same conductivity of linear response theory up to a forcing of about 10 kT, while the second displays a smaller conductivity, the difference in responses is due to geometric effects alone. (iii) Langevin simulations based on a naive mapping of the many-body equilibrium bulk diffusivity, D, onto the damping rate, gamma are also found to yield two distinct linear responses. However, in both regimes, the flux is significantly smaller than the one of MD simulations.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0031-9007
pubmed:author
pubmed:issnType
Print
pubmed:day
6
pubmed:volume
97
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
144509
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Molecular dynamics simulation of ratchet motion in an asymmetric nanochannel.
pubmed:affiliation
Department of Mechanics and Aeronautics, University of Rome La Sapienza, via Eudossiana 18, 00184 Rome, Italy.
pubmed:publicationType
Journal Article