Droplet Breakup of Shear-Thinning Gels at Low Weber Numbers
摘要
We explored the fragmentation behavior of Carbopol-water-based gel simulants at different Carbopol wt.% concentrations, and breakup morphologies are compared against the breakup of Newtonian fluids such as deionized water (DI). It is observed that increased Carbopol concentration affects the breakup events and delays the initiation and breakup phases. As the bag inflates, inhomogeneity appears at the bag interface, causing the bag to rupture early compared to DI water due to the Marangoni effect. DI water and Carbopol 0.05 wt.% (S-I) sample show rising cross-stream deformation, but Carbopol 0.1 wt.% (S-II) has nearly constant growth from initiation to the bag rupture period. Hence, child droplets from rim breakup have significantly higher volumes than DI water ones.