Abstract
The effect of the dispersed to continuous-phase viscosity ratio on the flow-induced coalescence of two equal-sized drops with clean interfaces was experimentally investigated. The experimental systems consisted of polybutadiene drops suspended in polydimethylsiloxane. The bulk-phase rheological properties of the fluids are Newtonian under the very weak flow conditions of the coalescence experiment (strain rate, is more prevalent for the higher viscosity ratio systems. On the other hand, the maximum offset for coalescence decreased with the viscosity ratio as expected.
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