Polymer rheology simulations at the meso- and macroscopic scale

E. Sultan, J. -W. van de Meent, E. Somfai, W. van Saarloos, Alexander Morozov

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We show that simulations of polymer rheology at a fluctuating mesoscopic scale and at the macroscopic scale where flow instabilities occur can be achieved at the same time with dissipative particle dynamics (DPD) technique. We model the viscoelasticity of polymer liquids by introducing a finite fraction of dumbbells in the standard DPD fluid. The stretching and tumbling statistics of these dumbbells is in agreement with what is known for isolated polymers in shear flows. At the same time, the model exhibits behaviour reminiscent of drag reduction in the turbulent state: as the polymer fraction increases, the onset of turbulence in plane Couette flow is pushed to higher Reynolds numbers. The method opens up the possibility to model non-trivial rheological conditions with ensuing coarse-grained polymer statistics. Copyright (c) EPLA, 2010

Original languageEnglish
Article number64002
Pages (from-to)-
Number of pages6
JournalEuropean Physical Society Letters (EPL)
Volume90
Issue number6
DOIs
Publication statusPublished - Jun 2010

Keywords / Materials (for Non-textual outputs)

  • DISSIPATIVE PARTICLE DYNAMICS
  • SHEAR-FLOW
  • VISCOELASTIC FLOW
  • DRAG REDUCTION
  • TURBULENCE
  • TRANSITION

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