Rheocoalescence: Relaxation Time through Coalescence of Droplets

The dynamics of the pendant drop coalescing with a sessile to form single daughter droplet is known bridge. bridge evolution begins point contact between two drops leading liquid neck size comparable diameter drops. To probe this phenomenon in polymeric fluids, we quantify radius growth during coalescence using high-speed imaging. In study, unveil existence three regimes on basis concentration ratio c/c*, namely, inertioelastic c/c* < ce/c*, viscoelastic ce/c* 20, and elasticity dominated > 20. Our results suggest that time (t) obeys power-law behavior tb, such coefficient b has steady value regimes, monotonic decrease regime. On dependence ratios, propose new measurement technique, rheocoalescence, which possibly can predict relaxation these fluids We also show deviation from universality proposed literature for