Leaky-dielectric phase field model for the axisymmetric breakup of an electrified jet

Abstract

We explore the axisymmetric breakup of electrified jets under wide ranges of the Taylor number (\ensuremath{\Gamma}), the Ohnesorge number (\ensuremath{\mathit{O}}h) and the wavenumber (\ensuremath{\mathit{k}}) which are relevant to electrosprays operating in the cone-jet mode. We extend prior numerical and experimental results by developing a phase field EHD model to account for the behavior of the jet after the pinch-off. For \ensuremath{\mathit{O}}h > 1, a much broader distribution of droplet size is observed which originates from the pinch-off region of the jet. For \ensuremath{\Gamma} \ensuremath{\ge} 1.5, the primary droplets are always unstable irrespective of the viscosity level.

Topics & Concepts