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@ARTICLE{Toneian:866677,
      author       = {Toneian, David and Kahl, Gerhard and Gompper, Gerhard and
                      Winkler, Roland G.},
      title        = {{H}ydrodynamic correlations of viscoelastic fluids by
                      multiparticle collision dynamics simulations},
      journal      = {The journal of chemical physics},
      volume       = {151},
      number       = {19},
      issn         = {1089-7690},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2019-05755},
      pages        = {194110},
      year         = {2019},
      abstract     = {The emergent fluctuating hydrodynamics of a viscoelastic
                      fluid modeled by the multiparticle collision dynamics (MPC)
                      approach is studied. The fluid is composed of flexible,
                      Gaussian phantom polymers that interact by local
                      momentum-conserving stochastic MPCs. For comparison, the
                      analytical solution of the linearized Navier-Stokes equation
                      is calculated, where viscoelasticity is taken into account
                      by a time-dependent shear relaxation modulus. The fluid
                      properties are characterized by the transverse velocity
                      autocorrelation function in Fourier space as well as in real
                      space. Various polymer lengths are considered—from
                      dumbbells to (near-)continuous polymers. Viscoelasticity
                      affects the fluid properties and leads to strong
                      correlations, which overall decay exponentially in Fourier
                      space. In real space, the center-of-mass velocity
                      autocorrelation function of individual polymers exhibits a
                      long-time tail, independent of the polymer length, which
                      decays as t−3/2, similar to a Newtonian fluid, in the
                      asymptotic limit t → ∞. Moreover, for long polymers, an
                      additional power-law decay appears at time scales shorter
                      than the longest polymer relaxation time with the same time
                      dependence, but negative correlations, and the polymer
                      length dependence L−1/2. Good agreement is found between
                      the analytical and simulation results},
      cin          = {IAS-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-2-20090406},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551)},
      pid          = {G:(DE-HGF)POF3-551},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:31757142},
      UT           = {WOS:000504060200015},
      doi          = {10.1063/1.5126082},
      url          = {https://juser.fz-juelich.de/record/866677},
}