Abstract
In this study, the motion of a drop rising through immiscible liquids with counter-current linear shear flows is experimentally examined. We especially focus on the effects of physical properties, the shear rate scale and the viscosity ratio on the rising motion of the drop. We experimentally show that the motion of a freely rising drop is very sensitive to not only physical properties of liquids and the scale of the shear flow but also the viscosity ratio. Our experiments reveal that the transversely migrating drop can be made to move to either the right or the left depending on the influence of these parameters.
