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Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films
Published on: August 18, 2018
Gravity-driven soap film dynamics in subcritical regimes
M I Auliel1, F Castro1, R Sosa1
1Laboratory of Fluid Dynamics, Facultad de Ingeniería, Universidad de Buenos Aires and CONICET, Paseo Colón 850, C1063ACV Buenos Aires, Argentina.
Abstract:
We undertake the analysis of soap-film dynamics with the classical approach of asymptotic expansions. We focus our analysis in vertical soap film tunnels operating in subcritical regimes with elastic Mach numbers M(e)=O((10(-1))). Considering the associated set of nondimensional numbers that characterize this flow, we show that the flow behaves as a two-dimensional (2D) divergence free flow with variable mass density. When the soap film dynamics agrees with that of a 2D and almost constant mass density flow, the regions where the second invariant of the velocity gradient is non-null correspond to regions where the rate of change of film thickness is non-negligible.
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