Abstract
We analyzed experimentally the damping of both axial and lateral free oscillations of small amplitude in axisymmetric liquid bridges. We excited the first oscillation mode in nearly inviscid and in moderately viscous liquid bridges, and measured the parameters which characterize that mode. The axial spatial dependence of those parameters was determined, and the influence of the equilibrium shape on the oscillation frequency and damping rate was analyzed by considering liquid bridges with very different volumes. The experimental results were compared with the solution of the Navier–Stokes equations in the limit of zero viscous Capillary number and of two one-dimensional models. These theoretical approaches predicted accurately the axial spatial dependence of the parameters characterizing the oscillation mode. Comparison with the experimental data showed remarkable agreement for the oscillation frequency, while significant discrepancies were found for the damping rate.
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