The Role of Vortex Stretching in Drag Reduction of Polymer-Laden Turbulent Flow
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866913999717662720 |
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| author | Bos, Wouter J. T. Shao, Xuan Wu, Tong Fang, Le |
| author_facet | Bos, Wouter J. T. Shao, Xuan Wu, Tong Fang, Le |
| contents | An addition of polymers can significantly reduce drag in wall-bounded turbulent flows, such as pipes or channels. This phenomenon is accompanied by a noticeable modification of the mean velocity profile. Starting from the premise that polymers reduce vortex-stretching, we derive a theoretical prediction for the mean-velocity profile. After assessing this prediction by numerical experiments of turbulence with reduced vortex stretching, we show that the theory successfully describes experimental measurements of drag-reduction in pipe-flow. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_15349 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The Role of Vortex Stretching in Drag Reduction of Polymer-Laden Turbulent Flow Bos, Wouter J. T. Shao, Xuan Wu, Tong Fang, Le Fluid Dynamics An addition of polymers can significantly reduce drag in wall-bounded turbulent flows, such as pipes or channels. This phenomenon is accompanied by a noticeable modification of the mean velocity profile. Starting from the premise that polymers reduce vortex-stretching, we derive a theoretical prediction for the mean-velocity profile. After assessing this prediction by numerical experiments of turbulence with reduced vortex stretching, we show that the theory successfully describes experimental measurements of drag-reduction in pipe-flow. |
| title | The Role of Vortex Stretching in Drag Reduction of Polymer-Laden Turbulent Flow |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2508.15349 |