An internal splash: Levitation of falling spheres in stratified fluids

@article{Abaid2004AnIS,
  title={An internal splash: Levitation of falling spheres in stratified fluids},
  author={Nicole Abaid and David Adalsteinsson and Akua Latebea Agyapong and Richard M. McLaughlin},
  journal={Physics of Fluids},
  year={2004},
  volume={16},
  pages={1567-1580}
}
We experimentally explore the motion of falling spheres in strongly stratified fluids in which the fluid transitions from low density at the top to high density at the bottom and document an internal splash in which the falling sphere may reverse its direction of motion (from falling, to rising, to falling again) as it penetrates a region of strong density transition. We present measurements of the sphere’s velocity and exhibit nonmonotonic sphere velocity profiles connecting the maximum and… 
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