75th Annual Meeting of the APS Division of Fluid Dynamics (November 20, 2022 — November 22, 2022)

V0030: Cratering by impact

  • Douglas Carvalho, UNICAMP - University of Campinas
  • Nicolao Lima, UNICAMP - University of Campinas
  • Erick Franklin, UNICAMP - University of Campinas
DOI: https://doi.org/10.1103/APS.DFD.2022.GFM.V0030

This video shows some of our main results for the impact of projectiles onto granular targets, such as happens when cm-size seeds fall on the ground or km-size asteroids collide with planets and moons. The video reproduces animations from a numerical investigation under review in Phys. Rev. E. For that, we carried out grain-scale computations (using the discrete element method) of the impact of solid projectiles on a cohesionless granular medium, where we varied the projectile and grain properties for different available energies. Among other results, we found that differences in grain concentrations (packing fractions) can engender the diversity of scaling laws for the penetration of the projectile found in the literature.

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