Fluid Acceleration in the Bulk Turbulence of Dilute Polymer Solutions

Details Fluid Acceleration in the Bulk Turbulence of Dilute Polymer Solutions Fluid Acceleration in the Bulk Turbulence of Dilute Polymer Solutions

2008-01-10

arxiv.org/abs/0801.1695v1

Physics

Fluid Dynamics

5 pages, 4 figures

Scientific paper

10.1088/1367-2630/10/12/123015

We report experimental measurements of Lagrangian accelerations in the bulk of intense turbulent flows of dilute polymer solutions by following tracer particles with a high-speed optical tracking system. We observed a significant decrease in the acceleration variance in dilute polymer solutions. The shape of the normalized acceleration probability density functions, however, remain the same as in Newtonian water flows. We also observed an increase in the turbulent Lagrangian acceleration autocorrelation time in these dilute polymer solutions.

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