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) |
|---|---|
| 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 |
|---|---|
| Volume | 131 |
| ISSN (Print) | 0930-8989 |
| ISSN (Electronic) | 1867-4941 |
Other
| Other | 3rd Conference on Turbulence, iTi 2008 |
|---|---|
| Country/Territory | Italy |
| City | Bertinoro |
| Period | 1/1/08 → 1/1/08 |
Bibliographical note
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