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Dynamic arrest in model porous media -- intermediate scattering functions

Spanner, Markus and Schnyder, Simon K. and Höfling, Felix and Voigtmann, Thomas and Franosch, Thomas (2013) Dynamic arrest in model porous media -- intermediate scattering functions. Soft Matter, 9, pp. 1604-1611. Royal Society of Chemistry. DOI: 10.1039/c2sm27060a ISSN 1744-683X

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Abstract

Heterogeneous media constitute random disordered environments where transport is drastically hindered. Employing extensive molecular dynamics simulations, we investigate the spatio-temporal dynamics of tracer particles in the Lorentz model in the vicinity of the localization transition. There transport becomes anomalous and non-gaussian due to the presence of self-similar spatial structures, and dynamic scaling behavior is anticipated. The interplay of different time and length scales is revealed by the intermediate scattering functions, which are sensitive both to the underlying spatial fractal as well as the anomalous transport. We compare our numerical results in the transition regime to a mode- coupling approach, and find that certain aspects are surprisingly well predicted.

Item URL in elib:https://elib.dlr.de/81207/
Document Type:Article
Title:Dynamic arrest in model porous media -- intermediate scattering functions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Spanner, MarkusUniversität Erlangen-NürnbergUNSPECIFIED
Schnyder, Simon K.Universität DüsseldorfUNSPECIFIED
Höfling, FelixMPI f. Intelligente Systeme StuttgartUNSPECIFIED
Voigtmann, Thomasthomas.voigtmann (at) dlr.deUNSPECIFIED
Franosch, ThomasUniversität Erlangen-NürnbergUNSPECIFIED
Date:January 2013
Journal or Publication Title:Soft Matter
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:9
DOI :10.1039/c2sm27060a
Page Range:pp. 1604-1611
Publisher:Royal Society of Chemistry
ISSN:1744-683X
Status:Published
Keywords:transport in heterogeneous media, Lorentz gas
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialforschung unter Mikro-g (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Voigtmann, Dr.rer.nat. Thomas
Deposited On:15 Feb 2013 08:22
Last Modified:06 Sep 2019 15:20

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