Modified capillary rheometry procedures for low viscosity liquids

We extend the range of the traditional capillarity breakup rheometer with oscillatory deformation profiles that avoid breakup. When used in conjunction with the differential analysis of McCarroll et al. (2016), oscillatory deformation will allow eventual characterization of viscoelastic properties. For Newtonian fluids, the midfilament radius histories are relatively independent of the filament Ohnesorge number, Oh, while the second derivative of curvature characterizes Oh. Using numerical simulations, we investigate the validity of the one-dimensional approximation and the sensitivity to experimental resolution in the Oh-frequency-amplitude-aspect ratio parameter space.