Abstract
While several mechanisms have been conjectured for the bubble pinching-off process, the underlying mechanism is still poorly understood, leaving the connection between the observed kinematics and the amplitude of the sound generated during the process unclear. Despite some experimental studies reporting the kinematics and the corresponding amplitude of the bubble sound emissions simultaneously (Nelli et al., AFMC, 2022), minimal numerical studies have been conducted to supplement these experiments. We report a numerical study by reproducing incompressible bubble pinch-off interface kinematics. Numerical simulations were performed by the volume-of-fluid (VoF) method, which keeps track of each phase fraction using a solution of the interface advection equation. Simulations are in good agreement on the kinematics at pinch-off despite several challenges associated with high-speed, high-distortion-rate interfacial dynamics.
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