Large shear deformation of particle gels studied by Brownian Dynamics simulations

A.A. Rzepiela, J.H.J. van Opheusden, T. van Vliet

Research output: Contribution to journalArticleAcademicpeer-review

16 Citations (Scopus)

Abstract

Brownian Dynamics (BD) simulations have been performed to study structure and rheology of particle gels under large shear deformation. The model incorporates soft spherical particles, and reversible flexible bond formation. Two different methods of shear deformation are discussed, namely affine and non-affine deformation, the second being novel in simulation studies of gels. Also two dynamic descriptions of the model are presented, with and without inertia effects. Non-affine deformation resulted in a slower increase of the stress at small deformation than affine deformation. At large deformation both models gave similar stress responses, although the inertia model resulted in lower stresses. The particle gels, regardless of the model used, were observed to fracture into lumps that compactified due to local reorganization. A reversible yielding transition, as observed in polymer gels, was not found. Fractal properties of the gels were irreversibly lost at large deformation
Original languageEnglish
Pages (from-to)863-880
JournalJournal of Rheology
Volume48
Issue number4
DOIs
Publication statusPublished - 2004

Keywords

  • behavior
  • kinetics
  • flow

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