Enhanced concentration fluctuations in polymer solutions under shear flow

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

Research output: Contribution to journalArticlepeer-review


We report an elastic-light-scattering experiment for a semidilute polymer solution under a uniform laminar shear flow. The concentration fluctuations are greatly enhanced by shear flow and their structure is highly anisotropic in both the weak (Ìd1) and strong (Ìd1) shear regimes, where Ì is the shear rate and d is the longest relaxation time of the system. The anisotropy is qualitatively different from binary liquid mixtures under a shear flow as a result of the strong coupling between the concentration fluctuations and the hydrodynamic flow.

Original languageEnglish (US)
Pages (from-to)2408-2411
Number of pages4
JournalPhysical Review Letters
Issue number18
StatePublished - 1991

ASJC Scopus subject areas

  • General Physics and Astronomy


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