Testing for scaling behavior dependence on geometrical and fluid parameters in the two fluid drop snap-off problem

We present experimental results on the snap-off dynamics of a drop with viscosity lh dripping through a fluid of viscosity h. This paper focuses on the Stokes regime where both the inner and outer fluid viscous stresses are balanced by the pressure gradients arising from the interfacial curvature. We track the time dependence of the drop profiles near snap-off and find that successive profiles can be rescaled onto a single curve. We explore the dependence of this scaling on the nozzle diameter, surface tension, density mismatch, and viscosity ratio l. We find that only l affects the rescaled profile. Finally we investigate the dependence of the breaking rate on l. © 2001 American Institute of Physics. @DOI: 10.1063/1.1409369#