A new form of mixing in turbulent sedimentation
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| Soggetti: | |
| Accesso online: | |
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| _version_ | 1866914283477008384 |
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| author | Tandurella, Simone Rosti, Marco Edoardo Musacchio, Stefano Boffetta, Guido |
| author_facet | Tandurella, Simone Rosti, Marco Edoardo Musacchio, Stefano Boffetta, Guido |
| contents | We study the sedimentation of finite-size inertial particles in a Rayleigh-Taylor-like setup using state-of-the-art direct numerical simulations. The falling particles are observed to produce two distinct regions: a leading mixing layer with a linear concentration profile followed by a bulk region of uniform density. Unlike classical RT turbulence, the mixing layer extension accelerates with an anomalous, non-integer exponent, while the bulk region moves at a constant velocity. A one-dimensional model based on a local hindered settling law accurately captures the observed dynamics and its dependence on the particle-to-fluid density ratio. The present work identifies a new regime of convective mixing which develops at the front of particle suspensions in sedimentation processes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_19212 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A new form of mixing in turbulent sedimentation Tandurella, Simone Rosti, Marco Edoardo Musacchio, Stefano Boffetta, Guido Fluid Dynamics We study the sedimentation of finite-size inertial particles in a Rayleigh-Taylor-like setup using state-of-the-art direct numerical simulations. The falling particles are observed to produce two distinct regions: a leading mixing layer with a linear concentration profile followed by a bulk region of uniform density. Unlike classical RT turbulence, the mixing layer extension accelerates with an anomalous, non-integer exponent, while the bulk region moves at a constant velocity. A one-dimensional model based on a local hindered settling law accurately captures the observed dynamics and its dependence on the particle-to-fluid density ratio. The present work identifies a new regime of convective mixing which develops at the front of particle suspensions in sedimentation processes. |
| title | A new form of mixing in turbulent sedimentation |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2601.19212 |