Volume entrained in the wake of a disk intruding into an oil-water interface

  title={Volume entrained in the wake of a disk intruding into an oil-water interface},
  author={Ivo R. Peters and Matteo Madonia and Detlef Lohse and Devaraj van der Meer},
An object moving through a plane interface into a fluid deforms the interface in such a way that fluid from one side of the interface is entrained into the other side, a phenomenon known as Darwin's drift. We investigate this phenomenon experimentally using a disk which is started exactly at the interface of two immiscible fluids, namely, oil and water. First, we observe that due to the density difference between the two fluids the deformation of the interface is influenced by gravity and show… 

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