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Tagged-particle motion in glassy systems under shear : comparison of mode coupling theory and Brownian Dynamics simulations

Tagged-particle motion in glassy systems under shear : comparison of mode coupling theory and Brownian Dynamics simulations

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KRÜGER, Matthias, Fabian WEYSSER, Matthias FUCHS, 2011. Tagged-particle motion in glassy systems under shear : comparison of mode coupling theory and Brownian Dynamics simulations. In: The European Physical Journal E. 34(9), 88. ISSN 1292-8941. eISSN 1292-895X

@article{Kruger2011-09Tagge-18356, title={Tagged-particle motion in glassy systems under shear : comparison of mode coupling theory and Brownian Dynamics simulations}, year={2011}, doi={10.1140/epje/i2011-11088-5}, number={9}, volume={34}, issn={1292-8941}, journal={The European Physical Journal E}, author={Krüger, Matthias and Weysser, Fabian and Fuchs, Matthias}, note={Article Number: 88} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/18356"> <dc:contributor>Weysser, Fabian</dc:contributor> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2012-02-10T14:22:51Z</dcterms:available> <dcterms:bibliographicCitation>First publ. in: The European Physical Journal E : Soft Matter and Biological Physics ; 34 (2011), 9. - 88</dcterms:bibliographicCitation> <dc:contributor>Krüger, Matthias</dc:contributor> <dc:creator>Fuchs, Matthias</dc:creator> <dc:rights>deposit-license</dc:rights> <dc:creator>Krüger, Matthias</dc:creator> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/18356"/> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2012-02-10T14:22:51Z</dc:date> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103605204-4002607-1"/> <dc:creator>Weysser, Fabian</dc:creator> <dc:contributor>Fuchs, Matthias</dc:contributor> <dcterms:title>Tagged-particle motion in glassy systems under shear : comparison of mode coupling theory and Brownian Dynamics simulations</dcterms:title> <dcterms:issued>2011-09</dcterms:issued> <dc:language>eng</dc:language> <dcterms:abstract xml:lang="eng">We study the dynamics of a tagged particle in a glassy system under shear. The recently developed integration through transients approach, based on mode coupling theory, is continued to arrive at the equations for the tagged-particle correlators and the mean squared displacements. The equations are solved numerically for a two-dimensional system, including a nonlinear stability analysis of the glass solution, the so called β-analysis. We perform Brownian Dynamics simulations in 2D and compare with theory. After switch on, transient glassy correlation functions show strong fingerprints of the stress overshoot scenario, including, additionally to previously studied superexponential decay, a shoulder-like slowing down after the overshoot. We also find a new type of Taylor dispersion in glassy states which has intriguing similarity to the known low-density case. The theory qualitatively captures most features of the simulations with quantitative deviations concerning the shear-induced time scales. We attribute these deviations to an underestimation of the overshoot scenario in the theory.</dcterms:abstract> </rdf:Description> </rdf:RDF>

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