The overflowing cylinder sixty years on

Mixtures of n-dodecyl-β-d-maltoside and hexaoxyethylene dodecyl ether — Surface properties, bulk properties, foam films, and foams

“…The surface age, τ s , in an MBP experiment can be approximately correlated with (2θ) − 1 , so the surface expansion rates in the range of 0.5-5 s − 1 correspond to surface ages of 0.1-1 s [21]. Fig.…”

Complexes of surfactants with oppositely charged polymers at surfaces and in bulk

“…Campbell et al [45] studied the kinetics of adsorption of these mixtures in an overflowing cylinder (OFC), which is a device for generating a continuously expanding flat liquid surface under steadystate conditions [46]. The surface of the OFC expands uniformly with a strain rate, θ, in the range of 0.5 -5 s -1 ; the equivalent surface age is given approximately by (2θ) -1 .…”

Determination of dynamic surface tension and viscosity of non-Newtonian fluids from drop oscillations

“…For a steady-state expansion, the surface age is given approximately by 1/(2θ). 23 Consequently the surface age for a freshly created drop is ~15 ms. Once the drop has been formed, the percentage of newly created or destroyed surface (upon deviation from spherical) is small, so the surface age evolves at a similar rate as real time. The experimental measurements (see Fig.…”