Abstract
We present a comparative experimental study of a turbulent flow developing in clear water and dilute polymer solutions (25 and 50 wppm polyethylene oxide). The flow is forced by a planar grid that oscillates vertically in a square container of initially still fluid. The two-component velocity fields are measured in a vertical plane passing through the center of the tank by using time resolved Particle Image Velocimetry (PIV). We obtain a lower entrainment rate for polymer solutions as compared to clear water. Extending arguments based on similarity and fractal theory to the case of dilute polymer solutions, we derive a relation between the entrainment rate and the fraction of input energy dissipated by the polymers.
Original language | English (US) |
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Title of host publication | Progress in Turbulence III - Proceedings of the iTi Conference in Turbulence 2008 |
Editors | Martin Oberlack, Joachim Peinke, Alessandro Talamelli |
Publisher | Springer Science and Business Media, LLC |
Pages | 207-210 |
Number of pages | 4 |
ISBN (Print) | 9783642022241 |
DOIs | |
State | Published - 2010 |
Event | 3rd Conference on Turbulence, iTi 2008 - Bertinoro, Italy Duration: Jan 1 2008 → Jan 1 2008 |
Publication series
Name | Springer Proceedings in Physics |
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Volume | 131 |
ISSN (Print) | 0930-8989 |
ISSN (Electronic) | 1867-4941 |
Other
Other | 3rd Conference on Turbulence, iTi 2008 |
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Country/Territory | Italy |
City | Bertinoro |
Period | 1/1/08 → 1/1/08 |
Bibliographical note
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Copyright:
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