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  • http://hdl.handle.net/10402/era.29433
  • Buckling of a thin, viscous film in an axisymmetric geometry
  • Bhattacharya, Sanjay
  • English
  • viscous
    buckling
    shear
    aximmetric
  • Nov 30, 2012 1:45 PM
  • Thesis
  • English
  • Adobe PDF
  • 9113251 bytes
  • An experimental study of the shear-induced buckling of a thin, viscous film in an axisymmetric geometry is presented. Rotating the inner boundary relative to a stationary outer one, generates large in-plane shear forces in the laterally constrained millimetric film, which leads to buckling of the viscous layer manifest as waves on the film surface. Regarding as independent variables the rotation rate, the gap width between the inner and outer boundaries and the film thickness and viscosity, the focus is on determining the number of waves excited plus their phase speed and amplitude by post-processing the experimental images in MATLAB. Experimental measurements of the number of waves excited, in the region between the onset of instability and the point of wave breaking, matches well with analogue predictions derived from an adaptation of the Foppl von Karman equation, which was originally developed to consider the wrinkling of an elastic membrane.
  • Master's
  • Master of Science
  • Department of Mechanical Engineering
  • Spring 2013
  • Flynn, Morris (Mechanical Engineering)
  • Flynn, Morris (Mechanical Engineering)
    Mitra, Sushanta (Mechanical Engineering)
    Heimpel, Moritz (Physics)