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On the mechanism of drag reduction in dilute polymer solutions |
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| Authors: | K. Hoyer A. Gyr A. Tsinober |
| Affiliation: | (1) Institute of Hydromechanics and Water Resources Management, Swiss Federal Institut of Technology, CH-8093 Zurich-Hönggerberg, Switzerland;(2) Department of Mechanical Engineering, University of California, Santa Barbara, USA;(3) Faculty of Engineering, Tel-Aviv University, Israel |
| Abstract: | Experimental evidence is given that drag reducing polymer molecules are preferentially collected by strained vortices. This can explain why extremely small amounts of additives can be so effective. They become concentrated in areas of a turbulent flow where they are most efficient. |
| Keywords: | drag reduction |
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