Modeling viscoelastic flow with discrete methods

E Somfai*, AN Morozov, W van Saarloos

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The hydrodynamics of viscoelastic materials (for example, polymer melts and solutions) presents interesting and complex phenomena, for example, instabilities and turbulent flow at very low Reynolds numbers due to normal stress effects and the existence of a finite stress relaxation time. This present work is motivated by renewed interest in instabilities in polymer flow. The majority of currently used numerical methods discretize a constitutive equation on a grid with finite difference or similar methods. We present work in progress in which we simulate viscoelastic flow with dissipative particle dynamics. The advantage of this approach is that many of the numerical instabilities of conventional methods can be avoided, and that the model gives clear physical insight into the origins of many viscoelastic flow instabilities. (c) 2005 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)93-97
Number of pages5
JournalPhysica a-Statistical mechanics and its applications
Volume362
Issue number1
DOIs
Publication statusPublished - 15 Mar 2006
Event13th International Conference on Discrete Simulation of Fluid Dyanmics - Cambridge, Morocco
Duration: 16 Aug 200420 Aug 2004

Keywords

  • dissipative particle dynamics
  • viscoelastic fluids
  • DISSIPATIVE PARTICLE DYNAMICS
  • SIMULATION
  • TURBULENCE

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