A phenomenological model for shear-thickening in wormlike micelle solutions

J. L. Goveas, D. J. Pine

Research output: Contribution to journalArticle

Abstract

We present a simple phenomenological model to describe shear-thickening in a wormlike micelle solution. The solution is assumed to undergo a reaction above a critical shear stress, to form a gel-like phase. There is no flow within this "gel" phase, and it is insoluble in the solution. The amount, of gel in the system is determined by a competition between a stress-dependent reaction rate, which creates gel, and a constant breakage rate, which destroys gel. We recover a re-entrant region in the stress-shear rate curve, which is only accessible under controlled stress conditions. When the apparent shear rate is fixed, the corresponding stress-shear rate relation is discontinuous. Our results are in qualitative agreement with the experimental observations of Pine et al.

Original languageEnglish (US)
Pages (from-to)706-712
Number of pages7
JournalEurophysics Letters
Volume48
Issue number6
DOIs
StatePublished - Dec 11 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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