Author(s): C. V. Alonso; W. H. Klaus; K. F. Wylie

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Abstract: Turbulence measurements were made in water and in a polyethylene oxide aqueous solution, using hot-film anemometry. Mean velocities, turbulence intensities, energy spectra and energy-dissipation rates were measured in a turbulent smooth-pipe flow. Mean flow structure showed that the mean velocity follows Virk's interactive-layer profile, and that the wall shear velocity is the proper velocity scale for polymer flows. Using Lumley's concept of an effective viscosity, the polymer spectra were cast into universal form and compared with Newtonian spectra. Results coincide reasonably well with the universal equilibrium theory. The major effect of the polymer additive appears to be an increase of the dissipative scales of the turbulence without significantly altering the basic structure of the flow, except near the wall.

DOI: https://doi.org/10.1080/00221687609499675

Year: 1976