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Vorticity Elongation in Sheared Polymeric Emulsions



Erik K. Hobbie, Kalman D. Migler


Stroboscopic video microscopy is used to study the shear-induced deformation of micron-size polystyrene droplets dispersed in a continuous phase of polyethylene. We observe a rich variety of droplet shapes as a function of shear rate and viscosity ratio that include droplets extended perpendicular to the flow field. A simple force-balance argument is presented that relates this novel behavior to the change in normal stress difference across the droplet interface.
Physical Review Letters


deformation, polymer droplets, polymer matrix, shear flow


Hobbie, E. and Migler, K. (1999), Vorticity Elongation in Sheared Polymeric Emulsions, Physical Review Letters, [online], (Accessed May 25, 2024)


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Created January 1, 1999, Updated February 17, 2017