2008/04/30 by Miguel A. Herrada, Alfonso M. Ganan-Calvo, Alfonso M. Gañán‐Calvo +5
Engineering · Physics and Astronomy · #Body orifice #Breakup #Composite material #Conical surface #Draft tube #Electrohydrodynamics and Fluid Dynamics #Flow (mathematics) #Fluid Dynamics and Heat Transfer #Innovative Microfluidic and Catalytic Techniques Innovation #Jet (fluid) #Materials science #Mechanical engineering #Mechanics #Physics #Rotational symmetry #Turbulence #Volume of fluid method #Volumetric flow rate #Weber number #physics.chem-ph #physics.flu-dyn
paper · pdf · doi:10.1103/physreve.78.036323
Submitted to the Physical Review E on December 8th, 2007
arxiv created 2008/05/14 · openalex publication_date 2008/09/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The liquid cone-jet mode can be produced upon stimulation by a coflowing gas sheath. Most applications deal with the jet breakup, leading to either of two droplet generation regimes: Jetting and dripping. The cone-jet flow pattern is explored by direct axisymmetric volume of fluid (VOF) numerical simulation; its evolution is studied as the liquid flow rate is increased around the jetting-dripping transition. As observed in other focused flows such as electrospraying cones upon steady thread emission, the flow displays a strong recirculating pattern within the conical meniscus; it is shown to play a role on the stability of the system, being a precursor to the onset of dripping. Close to the minimum liquid flow rate for steady jetting, the recirculation cell penetrates into the feed tube. Both the jet diameter and the size of the cell are accurately estimated by a simple theoretical model. In addition, the transition from jetting to dripping is numerically analyzed in detail in some illustrative cases, and compared, to good agreement, with a set of experiments.