Basset-Boussinesq history force and inertia are relevant for unsteady particle settling dynamics
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866916796080062464 |
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| author | Jaroslawski, Tomek Jaganathan, Divya Govindarajan, Rama McKeon, Beverley |
| author_facet | Jaroslawski, Tomek Jaganathan, Divya Govindarajan, Rama McKeon, Beverley |
| contents | Our experiments on a sphere falling under gravity in Stokes flow show significant history effects. We observe an algebraic, not exponential, relaxation rate to the terminal velocity, validating the solution to the Basset-Boussinesq-Oseen equation. Unlike in steady Stokes theory, our experiments and theory reveal a vortex ring forming around the sphere and drifting away. As the Reynolds number nears unity, the vortex ring lags behind the sphere, departing from Stokesian theory, though the sphere's algebraic response persists. These findings are critical for interactions in the Stokes limit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_12530 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Basset-Boussinesq history force and inertia are relevant for unsteady particle settling dynamics Jaroslawski, Tomek Jaganathan, Divya Govindarajan, Rama McKeon, Beverley Fluid Dynamics Our experiments on a sphere falling under gravity in Stokes flow show significant history effects. We observe an algebraic, not exponential, relaxation rate to the terminal velocity, validating the solution to the Basset-Boussinesq-Oseen equation. Unlike in steady Stokes theory, our experiments and theory reveal a vortex ring forming around the sphere and drifting away. As the Reynolds number nears unity, the vortex ring lags behind the sphere, departing from Stokesian theory, though the sphere's algebraic response persists. These findings are critical for interactions in the Stokes limit. |
| title | Basset-Boussinesq history force and inertia are relevant for unsteady particle settling dynamics |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2408.12530 |