Newtonian drop in a Newtonian matrix subjected to large amplitude oscillatory shear flows

The dynamics of a single Newtonian drop immersed in a Newtonian matrix subjected to large-amplitude oscillatory shear flow is investigated. The ratio of the drop and matrix viscosity is above criticality, and thus break-up is absent under const. shear flow. At small forcing amplitudes the drop shape follows a "regular" oscillation. As the forcing amplitude increases, multipeaked oscillations of drop shape and orientation are obsd. Exptl. results are compared with predictions obtained with a phenomenol. model. Model predictions are in qual. good agreement with exptl. data. The model suggests that the appearance of higher harmonics in the drop response is mainly due to flow nonaffinity.