Vertically neutral collapse of a pulsating bubble occurs when the boundaries above or below balance buoyancy effect over pulsation. In this study, vertically near vertical rigid wall free surface is investigated. The boundary integral method (BIM) employed to model dynamics with an open-domain surface. Moreover, validated against several buoyant experiments. Bubble in such conditions are associ...

We have undertaken new observations tracing the evolution of shocks along the best resolved examples of protostellar jets by means of high resolution, deep K-band spectroscopy at UKIRT and NTT. In this paper we analyse trends in H2 excitation within the well collimated jet of HH 212, comprising multiple bows along each flow axis. The aim of our survey is to better understand the origin of the s...

Aims. Elongated jets from young stellar objects typically present a nodular structure, formed by a chain of bright knots of enhanced emission with individual proper motions. Though it is generally accepted that internal shocks play an important role in the formation and dynamics of such structures, their precise origin and the mechanisms behind the observed proper motions is still a matter of d...

Abstract In this paper, a Taylor cone model in the nanoscale is configured using many-body dissipative particle dynamics method. The sharpening process of and breakup at different electric field intensities charge concentrations are systematically investigated. Under strong field, hemispherical droplet sharpened over time evolves into conic one. Then cusp emits thin jet. Finally, shrinks semi-s...

Experiments were performed to study the production of broadband sound in confined pulsating jets through orifices with a time-varying area. The goal was to better understand broadband sound generation at the human glottis during voicing. The broadband component was extracted from measured sound signals by the elimination of the periodic component through ensemble averaging. Comparisons were mad...