Enhancement of mixing by rodlike polymers

  • Stefano Musacchio
  • Massimo Cencini
  • Emmanuel L. C. VI M. Plan
  • Dario Vincenzi
Regular Article
Part of the following topical collections:
  1. Flowing Matter, Problems and Applications


We study the mixing of a passive scalar field dispersed in a solution of rodlike polymers in two dimensions, by means of numerical simulations of a rheological model for the polymer solution. The flow is driven by a parallel sinusoidal force (Kolmogorov flow). Although the Reynolds number is lower than the critical value for inertial instabilities, the rotational dynamics of the polymers generates a chaotic flow similar to the so-called elastic-turbulence regime observed in extensible polymer solutions. The temporal decay of the variance of the scalar field and its gradients shows that this chaotic flow strongly enhances mixing.

Graphical abstract


Topical issue: Flowing Matter, Problems and Applications 


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Copyright information

© EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Stefano Musacchio
    • 1
  • Massimo Cencini
    • 2
    • 3
  • Emmanuel L. C. VI M. Plan
    • 4
  • Dario Vincenzi
    • 1
  1. 1.Université Côte d’AzurCNRS, LJADNiceFrance
  2. 2.Istituto dei Sistemi ComplessiCNRRomaItaly
  3. 3.INFNSezione di Roma Tor VergataRomaItaly
  4. 4.Rudolf Peierls Centre for Theoretical PhysicsUniversity of Oxford3PUUK

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