FIG. 33 Theoretical dependence of the ratio γ /γ on flow rates v calculated

Comparison of the results of calculations (Fig. 33) with experimental data shown in Fig. 32, demonstrates qualitative agreement between both. The quantitative differences may be associated with the fact that the theory starts from the condition γ=γo at v=0. However, in experiments the conditions v=0 corresponds to γ cos θ<γo because cos θ>1. In some cases, experimental values of γ cos θ at v=0 are higher than 1. This suggests that in the case under consideration the interface tension, even near to v≈0, has not yet relaxed to the equilibrium value γo.