Figure 2
From: Heterogeneous flow inside threads of low viscosity fluids leads to anomalous long filament lifetimes
Flow properties of dilute surfactant solutions in shear and elongation. Data shown for a dilute 10 mM CTAB/NaSal, R = 0.5 surfactant solution. (a) Steady shear data, showing a hysteretic flow curve under controlled shear stress conditions. The dashed line represents the minimum torque limit of the rheometer. (b) Filament thinning behavior during capillary breakup, as probed by CaBER with initial and final height of hi = 1.5 mm and hf = 6 mm, respectively and strike time ts = 40 ms. The inset picture shows a snapshot of the cylindrical filament at 40 s. (c) Filament lifetime as a function of strike time (left) and viscosity ratio between outer phase (i.e., air or silicone oil) and surfactant solution (right) in CaBER experiments. The blue square represents the filament lifetime in air as the surrounding phase.
