A Quantitative Approach to Brownian Motions of Polymers under Flow

ORAL

Abstract

A quantitative method is proposed for studying self-correlations of polymers under flow. Analysis of nonequilibrium molecular dynamics simulations shows that in the flow frame the probability density functions of center of mass displacements can be described by superdiffusive, anisotropic Gaussian distributions. This behavior originates from interactions between centers of mass of polymers, which cannot be properly treated by mean-field models. Additionally, the segmental fluctuations in the polymer frame are strongly suppressed by flow. The origin of this phenomenon will be discussed.

*The research is supported by the U.S. DOE-BES, Early Career Research Program Award KC0402010, under Contract DE-AC05-00OR22725.

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Presenters

  • Yangyang Wang

    • Oak Ridge National Lab
    • Oak Ridge National Laboratory

Authors

  • Yangyang Wang

    • Oak Ridge National Lab
    • Oak Ridge National Laboratory

  • Zhiqiang Shen

    • Oak Ridge National Lab

  • Jan-Michael Y Carrillo

    • Oak Ridge National Lab
    • Nanomaterials Theory Institute, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States

  • Bobby G Sumpter

    • Oak Ridge National Lab
    • Oak Ridge National Laboratory