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Encapsulated drop breakup in shear flow
K A Smith1, J M Ottino, M Olvera de la Cruz
1Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, USA.
Abstract:
We investigate the deformation and breakup in shear flow of an encapsulated drop in which both the core and shell are Newtonian fluids. The equations of motion are solved numerically using a level set method to track interface motion. We consider the case of a drop stretched to a given length in constant shear and then allowed to relax. A range of morphologies is produced, and novel kinematics occur, due to the interaction of the core and outer interfaces. A phase diagram is presented to describe the morphologies produced over a range of capillary numbers and core interfacial tensions.
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