Dynamics of thin liquid films on vertical cylindrical fibers

Abstract

Recent experiments of thin films flowing down a vertical fiber with varying nozzle diameters present a wealth of new dynamics that illustrate the need for more advanced theory. We present a detailed analysis using a full lubrication model that includes slip boundary conditions, nonlinear curvature terms, and a film stabilization term. This study brings to focus the presence of a stable liquid layer playing an important role in the full dynamics. We propose a combination of these physical effects to explain the observed velocity and stability of traveling droplets in the experiments and their transition to isolated droplets. This is also supported by stability analysis of the traveling wave solution of the model.

arXiv comment25 pages, 17 figures

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• Dynamics of Free Surface Perturbations Along an Annular Viscous Film
• On the depinning of a drop of partially wetting liquid on a rotating cylinder