69th Annual Meeting of the APS Division of Fluid Dynamics (November 20, 2016 — November 22, 2016)

V0038: Fall and fragmentation of liquid metal in a viscous fluid

  • Jean Baptiste Wacheul, CNRS, Aix-Marseille Univ and ECM, UMR 7342
  • Michaël Le Bars, CNRS, Aix-Marseille Univ and ECM, UMR 7342
DOI: https://doi.org/10.1103/APS.DFD.2016.GFM.V0038

Terrestrial planets are mainly composed of silicate and iron. These two immiscible components were liquid in the early stage of planets formation. Because of its higher density, iron forms the core, while silicate forms the outer shell of terrestrial planets. It is thought that Earth experienced several large impacts, including an impact with a Mars size body. After the impact, the iron core flowed through the molten silicate (magma ocean). As they were in close proximity, the two fluids exchanged heat and radio-elements. This had a significant influence on the initial thermochemical state of the Earth, hence on its further evolution. We study this event using a laboratory model experiment of the post-impact flow.


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