Universal mean velocity profile in polymeric flows at maximum drag reduction
Fuente:
arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Acceso en línea: | |
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| _version_ | 1866912278481207296 |
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| author | Serafini, Francesco Battista, Francesco Gualtieri, Paolo Casciola, Carlo Massimo |
| author_facet | Serafini, Francesco Battista, Francesco Gualtieri, Paolo Casciola, Carlo Massimo |
| contents | Provided a sufficient concentration of long-chain polymers in a Newtonian solvent, turbulent wall-bounded flows exhibit a universal state known as Maximum Drag Reduction (MDR). Through direct numerical simulations, we show that the wall-normal kinetic energy flux characterising Newtonian wall-bounded turbulence is suppressed at MDR, and that the polymers mainly sustain velocity fluctuations. In agreement with the experimental data, we derive a universal expression for the mean velocity profile no longer dependent on characteristic quantities of wall-bounded turbulence. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_13168 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Universal mean velocity profile in polymeric flows at maximum drag reduction Serafini, Francesco Battista, Francesco Gualtieri, Paolo Casciola, Carlo Massimo Fluid Dynamics Provided a sufficient concentration of long-chain polymers in a Newtonian solvent, turbulent wall-bounded flows exhibit a universal state known as Maximum Drag Reduction (MDR). Through direct numerical simulations, we show that the wall-normal kinetic energy flux characterising Newtonian wall-bounded turbulence is suppressed at MDR, and that the polymers mainly sustain velocity fluctuations. In agreement with the experimental data, we derive a universal expression for the mean velocity profile no longer dependent on characteristic quantities of wall-bounded turbulence. |
| title | Universal mean velocity profile in polymeric flows at maximum drag reduction |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2503.13168 |