Sign on

SAO/NASA ADS Physics Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· References in the article
· Citations to the Article (10) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Discretized model for diffusion of a chain in one dimension
Authors:
Guidoni, S. E.; Mártin, H. O.; Aldao, C. M.
Affiliation:
Institute of Materials Science and Technology (INTEMA), Universidad Nacional de Mar del Plata–CONICET, Juan B. Justo 4302, 7600 Mar del Plata, Argentina
Publication:
Physical Review E, vol. 67, Issue 3, id. 031804 (PhRvE Homepage)
Publication Date:
03/2003
Origin:
APS
PACS Keywords:
Macromolecules and polymer molecules, Reptation and tube theories, Diffusion and thermal diffusion
Abstract Copyright:
(c) 2003: The American Physical Society
DOI:
10.1103/PhysRevE.67.031804
Bibliographic Code:
2003PhRvE..67c1804G

Abstract

With the help of Monte Carlo simulations, the one-dimensional diffusion motion of a chain of N beads is studied to determine its diffusion coefficient and viscosity. We found that the end bead movements with respect to that of the central beads play a key role. There is no memory between bead hops but they become correlated as a consequence of the chain dynamics. This determines the scaling exponents and the relation connecting them. In particular, the scaling exponent for the viscosity can be smaller or greater than 3 but it must scale as N3 in the asymptotic regime (N→∞). We analyze in detail the dynamics of a chain with three beads to explain why the expected relation between diffusivity and viscosity exponents is not satisfied.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints