Mode selection in the dynamics of sheared polymer solutions

P. K. Dixon; D. J. Pine; X. L. Wu

doi:10.1103/PhysRevLett.68.2239

Mode selection in the dynamics of sheared polymer solutions

P. K. Dixon, D. J. Pine, X. L. Wu

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

We report transient light-scattering measurements upon the cessation of shear for a semidilute polymer solution under theta conditions. The polymer solution demonstrates two modes of relaxation for concentration fluctuations in equilibrium. The transient measurements show that the mechanism that couples the concentration fluctuations to the shear flow, and thereby enhances concentration fluctuations, selectively enhances only the slower of the two equilibrium modes. This selective enhancement generates a long-wavelength peak in the shear-enhanced structure.

Original language	English (US)
Pages (from-to)	2239-2242
Number of pages	4
Journal	Physical Review Letters
Volume	68
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.68.2239
State	Published - 1992

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.68.2239

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title = "Mode selection in the dynamics of sheared polymer solutions",

abstract = "We report transient light-scattering measurements upon the cessation of shear for a semidilute polymer solution under theta conditions. The polymer solution demonstrates two modes of relaxation for concentration fluctuations in equilibrium. The transient measurements show that the mechanism that couples the concentration fluctuations to the shear flow, and thereby enhances concentration fluctuations, selectively enhances only the slower of the two equilibrium modes. This selective enhancement generates a long-wavelength peak in the shear-enhanced structure.",

author = "Dixon, {P. K.} and Pine, {D. J.} and Wu, {X. L.}",

year = "1992",

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AB - We report transient light-scattering measurements upon the cessation of shear for a semidilute polymer solution under theta conditions. The polymer solution demonstrates two modes of relaxation for concentration fluctuations in equilibrium. The transient measurements show that the mechanism that couples the concentration fluctuations to the shear flow, and thereby enhances concentration fluctuations, selectively enhances only the slower of the two equilibrium modes. This selective enhancement generates a long-wavelength peak in the shear-enhanced structure.

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Mode selection in the dynamics of sheared polymer solutions

Abstract

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