Radiatively driven convection: diffusivity-free regimes of geophysical and astrophysical flows in the laboratory
We consider the turbulent heat transport induced by thermal convection. The widespread belief is that the transport properties of the turbulent flow should be independent of the tiny molecular diffusivities for asymptotically strong driving, but the associated “ultimate” scaling regime proves challe...
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| Format: | Article |
| Language: | English |
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Académie des sciences
2024-12-01
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| Series: | Comptes Rendus. Physique |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.207/ |
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| author | Hadjerci, Gabriel Bouillaut, Vincent Miquel, Benjamin Aumaître, Sébastien Gallet, Basile |
| author_facet | Hadjerci, Gabriel Bouillaut, Vincent Miquel, Benjamin Aumaître, Sébastien Gallet, Basile |
| author_sort | Hadjerci, Gabriel |
| collection | DOAJ |
| description | We consider the turbulent heat transport induced by thermal convection. The widespread belief is that the transport properties of the turbulent flow should be independent of the tiny molecular diffusivities for asymptotically strong driving, but the associated “ultimate” scaling regime proves challenging to observe experimentally using standard convection cells (Rayleigh–Bénard geometry). We thus recently introduced an alternate experimental setup where convection is driven radiatively, with internal heating within the lower region of the body of fluid. This setup naturally leads to the ultimate regime of thermal convection. We then discuss how adding global rotation to the experimental setup has led to the first laboratory observation of the diffusivity-free regime of rapidly rotating turbulent convection, also known as the “geostrophic turbulence” scaling regime. |
| format | Article |
| id | doaj-art-33bc5eb096af47de809a1e1b71006ce0 |
| institution | Kabale University |
| issn | 1878-1535 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Physique |
| spelling | doaj-art-33bc5eb096af47de809a1e1b71006ce02025-02-07T13:54:24ZengAcadémie des sciencesComptes Rendus. Physique1878-15352024-12-0111610.5802/crphys.20710.5802/crphys.207Radiatively driven convection: diffusivity-free regimes of geophysical and astrophysical flows in the laboratoryHadjerci, Gabriel0Bouillaut, Vincent1Miquel, Benjamin2Aumaître, Sébastien3Gallet, Basile4Université Paris-Saclay, CNRS, CEA, Service de Physique de l’Etat Condensé, 91191 Gif-sur-Yvette, FranceOnera Châtillon, 92320, Châtillon, FranceUniv Lyon, CNRS, Ecole Centrale de Lyon, INSA Lyon, Université Claude Bernard Lyon 1, LMFA, UMR5509, 69130, Ecully, FranceUniversité Paris-Saclay, CNRS, CEA, Service de Physique de l’Etat Condensé, 91191 Gif-sur-Yvette, FranceUniversité Paris-Saclay, CNRS, CEA, Service de Physique de l’Etat Condensé, 91191 Gif-sur-Yvette, FranceWe consider the turbulent heat transport induced by thermal convection. The widespread belief is that the transport properties of the turbulent flow should be independent of the tiny molecular diffusivities for asymptotically strong driving, but the associated “ultimate” scaling regime proves challenging to observe experimentally using standard convection cells (Rayleigh–Bénard geometry). We thus recently introduced an alternate experimental setup where convection is driven radiatively, with internal heating within the lower region of the body of fluid. This setup naturally leads to the ultimate regime of thermal convection. We then discuss how adding global rotation to the experimental setup has led to the first laboratory observation of the diffusivity-free regime of rapidly rotating turbulent convection, also known as the “geostrophic turbulence” scaling regime.https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.207/turbulent convectiongeophysical and astrophysical fluid dynamicsrotating turbulence |
| spellingShingle | Hadjerci, Gabriel Bouillaut, Vincent Miquel, Benjamin Aumaître, Sébastien Gallet, Basile Radiatively driven convection: diffusivity-free regimes of geophysical and astrophysical flows in the laboratory Comptes Rendus. Physique turbulent convection geophysical and astrophysical fluid dynamics rotating turbulence |
| title | Radiatively driven convection: diffusivity-free regimes of geophysical and astrophysical flows in the laboratory |
| title_full | Radiatively driven convection: diffusivity-free regimes of geophysical and astrophysical flows in the laboratory |
| title_fullStr | Radiatively driven convection: diffusivity-free regimes of geophysical and astrophysical flows in the laboratory |
| title_full_unstemmed | Radiatively driven convection: diffusivity-free regimes of geophysical and astrophysical flows in the laboratory |
| title_short | Radiatively driven convection: diffusivity-free regimes of geophysical and astrophysical flows in the laboratory |
| title_sort | radiatively driven convection diffusivity free regimes of geophysical and astrophysical flows in the laboratory |
| topic | turbulent convection geophysical and astrophysical fluid dynamics rotating turbulence |
| url | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.207/ |
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