Forced and natural dynamics of a clamped flexible fiber in wall turbulence
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866910445371129856 |
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| author | Rota, Giulio Foggi Koseki, Morie Agrawal, Riya Olivieri, Stefano Rosti, Marco Edoardo |
| author_facet | Rota, Giulio Foggi Koseki, Morie Agrawal, Riya Olivieri, Stefano Rosti, Marco Edoardo |
| contents | We characterize the dynamical behavior of a clamped flexible fiber immersed in wall turbulence over a wide range of natural frequencies by means of direct numerical simulations. Only two flapping states are possible: one where the fiber oscillates at the characteristic frequency of the largest turbulent eddies and another where the natural structural response dominates. The former is obtained in the more flexible cases, while the latter in the more rigid ones. We observe here for the first time that in the turbulence dominated regime the fiber always sways at a frequency proportional to the largest scale of the flow, regardless of its structural parameters. The hindrance of the clamp to the wall prevents the synchronization of the fiber with turbulent eddies of comparable size. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_14574 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Forced and natural dynamics of a clamped flexible fiber in wall turbulence Rota, Giulio Foggi Koseki, Morie Agrawal, Riya Olivieri, Stefano Rosti, Marco Edoardo Fluid Dynamics We characterize the dynamical behavior of a clamped flexible fiber immersed in wall turbulence over a wide range of natural frequencies by means of direct numerical simulations. Only two flapping states are possible: one where the fiber oscillates at the characteristic frequency of the largest turbulent eddies and another where the natural structural response dominates. The former is obtained in the more flexible cases, while the latter in the more rigid ones. We observe here for the first time that in the turbulence dominated regime the fiber always sways at a frequency proportional to the largest scale of the flow, regardless of its structural parameters. The hindrance of the clamp to the wall prevents the synchronization of the fiber with turbulent eddies of comparable size. |
| title | Forced and natural dynamics of a clamped flexible fiber in wall turbulence |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2310.14574 |