Abstract
In this work, the deformation and breakup behavior of the single-core composite and homogeneous droplets subjected to a simple shear flow between two parallel walls have been investigated numerically. The attention was focused on the studying of the high-viscosity droplets, which can be noticeably deformed or broken only in narrow channels. The influence of a low-viscosity core on hydrodynamics of the composite droplet with a high-viscosity shell has been studied for the first time at different capillary numbers and confinement degrees (the ratio of a droplet diameter to a channel thickness). It was found that a composite droplet is more stable as compared to a similar high-viscosity homogeneous droplet and breaks up at a higher capillary number.
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