Pattern formation in Taylor-Couette flow of dilute polymer solutions: Dynamical simulations and mechanism

D. G. Thomas, R. Sureshkumar, B. Khomami

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Abstract

We report spatiotemporal pattern formation in Taylor-Couette flow (i.e., flow between rotating cylinders) of viscoelastic dilute polymer solutions obtained for the first time from first-principles dynamical simulations. Solution structures with varying spatial and temporal symmetries, such as rotating standing waves, flames, disordered oscillations, and solitary vortex solutions which include diwhirls (stationary and axisymmetric) and oscillatory strips (axisymmetric or nonaxisymmetric), are observed, depending on the ratio of fluid relaxation time to the time period of inner cylinder rotation. The flow-microstructure coupling mechanisms underlying the pattern formation process are also discussed.

Original languageEnglish (US)
Article number054501
JournalPhysical Review Letters
Volume97
Issue number5
DOIs
StatePublished - Aug 7 2006

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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