Figure 1
From: Heterogeneous flow inside threads of low viscosity fluids leads to anomalous long filament lifetimes
Formation of remarkably long surfactant filaments. Series of snapshots showing the formation of long filaments using a dilute surfactant solution (10 mM hexadecyltrimethylammonium bromide/sodium salicylate (CTAB/NaSal), R = 0.5). (a) A drop detaches due to gravity g from a blunt needle with diameter Dn = 1.65 mm, forming a long filament. (b) Cylindrical piston with diameter Dp = 6 mm moves upwards with a constant velocity vp ≈ 3 mm/s using a linear motor (Texture Analyzer TA.XTplus, Stable Micro System) and creates a fluid thread. The black area at the bottom of (b) indicates the fluid reservoir. Bars on the left and right of both panels represent a length of 10 cm.
