Solid–liquid phase change in planetary cores
The ubiquitous phenomena of crystallization and melting occur in various geophysical contexts across many spatial and temporal scales. In particular, they take place in the iron core of terrestrial planets and moons, profoundly influencing their dynamics and magnetic field generation. Crystallizatio...
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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.216/ |
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| author | Huguet, Ludovic Kriaa, Quentin Alboussière, Thierry Le Bars, Michael |
| author_facet | Huguet, Ludovic Kriaa, Quentin Alboussière, Thierry Le Bars, Michael |
| author_sort | Huguet, Ludovic |
| collection | DOAJ |
| description | The ubiquitous phenomena of crystallization and melting occur in various geophysical contexts across many spatial and temporal scales. In particular, they take place in the iron core of terrestrial planets and moons, profoundly influencing their dynamics and magnetic field generation. Crystallization and melting entail intricate multiphase flows, buoyancy effects, and out-of-equilibrium thermodynamics, posing challenges for theoretical modeling and numerical simulations. Besides, due to the inaccessible nature of the planetary deep interior, our understanding relies on indirect data from seismology, mineral physics, geochemistry, and magnetism. Consequently, phase-change-driven flows in planetary cores constitute a compelling yet challenging area of research. This paper provides an overview of the role of laboratory fluid dynamics experiments in elucidating the solid–liquid phase change phenomena occurring thousands of kilometers beneath our feet and within other planetary depths, along with their dynamic repercussions. Drawing parallel with metallurgy, it navigates through all scales of phase change dynamics, from microscopic processes (nucleation and crystal growth) to macroscopic consequences (solid–liquid segregation and large-scale flows). The review delves into the two primary planetary solidification regimes, top-down and bottom-up, and elucidates the formation of mushy and/or slurry layers in the various relevant configurations. Additionally, it outlines remaining challenges, including insights from ongoing space missions poised to unveil the diverse planetary regimes. |
| format | Article |
| id | doaj-art-a0a351b7f8a44f5c8781e87dcfd79732 |
| 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-a0a351b7f8a44f5c8781e87dcfd797322025-02-07T13:54:24ZengAcadémie des sciencesComptes Rendus. Physique1878-15352024-12-0113910.5802/crphys.21610.5802/crphys.216Solid–liquid phase change in planetary coresHuguet, Ludovic0https://orcid.org/0000-0002-5532-6302Kriaa, Quentin1https://orcid.org/0000-0002-3518-1660Alboussière, Thierry2https://orcid.org/0000-0002-3692-899X Le Bars, Michael3https://orcid.org/0000-0002-4884-6190ISTerre, Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, 38000 Grenoble, FrancePhysics of Fluids Group, Max Planck Center for Complex Fluid Dynamics, and J. M. Burgers Centre for Fluid Dynamics, University of Twente, P.O. Box 217, 7500AE Enschede, The NetherlandsUniversité de Lyon, ENSL, UCBL, UJM, CNRS, Laboratoire LGL-TPE, FranceCNRS, Aix Marseille Univ, Centrale Marseille, IRPHE, Marseille, FranceThe ubiquitous phenomena of crystallization and melting occur in various geophysical contexts across many spatial and temporal scales. In particular, they take place in the iron core of terrestrial planets and moons, profoundly influencing their dynamics and magnetic field generation. Crystallization and melting entail intricate multiphase flows, buoyancy effects, and out-of-equilibrium thermodynamics, posing challenges for theoretical modeling and numerical simulations. Besides, due to the inaccessible nature of the planetary deep interior, our understanding relies on indirect data from seismology, mineral physics, geochemistry, and magnetism. Consequently, phase-change-driven flows in planetary cores constitute a compelling yet challenging area of research. This paper provides an overview of the role of laboratory fluid dynamics experiments in elucidating the solid–liquid phase change phenomena occurring thousands of kilometers beneath our feet and within other planetary depths, along with their dynamic repercussions. Drawing parallel with metallurgy, it navigates through all scales of phase change dynamics, from microscopic processes (nucleation and crystal growth) to macroscopic consequences (solid–liquid segregation and large-scale flows). The review delves into the two primary planetary solidification regimes, top-down and bottom-up, and elucidates the formation of mushy and/or slurry layers in the various relevant configurations. Additionally, it outlines remaining challenges, including insights from ongoing space missions poised to unveil the diverse planetary regimes.https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.216/CrystallizationPhase changeTwo-phase flowsPlanetary coresMagnetic field |
| spellingShingle | Huguet, Ludovic Kriaa, Quentin Alboussière, Thierry Le Bars, Michael Solid–liquid phase change in planetary cores Comptes Rendus. Physique Crystallization Phase change Two-phase flows Planetary cores Magnetic field |
| title | Solid–liquid phase change in planetary cores |
| title_full | Solid–liquid phase change in planetary cores |
| title_fullStr | Solid–liquid phase change in planetary cores |
| title_full_unstemmed | Solid–liquid phase change in planetary cores |
| title_short | Solid–liquid phase change in planetary cores |
| title_sort | solid liquid phase change in planetary cores |
| topic | Crystallization Phase change Two-phase flows Planetary cores Magnetic field |
| url | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.216/ |
| work_keys_str_mv | AT huguetludovic solidliquidphasechangeinplanetarycores AT kriaaquentin solidliquidphasechangeinplanetarycores AT alboussierethierry solidliquidphasechangeinplanetarycores AT lebarsmichael solidliquidphasechangeinplanetarycores |