• Corpus ID: 235489665

Scaling law for viscous friction in thin lubricating films that acts on a solid disk falling in confined space

  title={Scaling law for viscous friction in thin lubricating films that acts on a solid disk falling in confined space},
  author={Nana Tanaka and Ko Okumura},
Abstract We fill a viscous liquid in a vertically stood cell of millimeter thickness, called the Hele-Shaw cell, and insert a disk in the liquid whose thickness is smaller than the cell thickness. The disk starts falling in the liquid due to gravity with opposed by viscous friction. We focus on the case in which lubricating films formed in the gap between the cell surface and the disk surface are thinner than the disk thickness. As a result, we find a distinct regime in which the flow and the… 

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