Insulated multinozzle system for electrohydrodynamic atomization in the simple-jet mode

In this study, a multinozzle electrohydrodynamic atomization device was designed and studied for electrosprays in the simple-jet mode. Results have shown that the proposed device produces droplets with similar diameter in all nozzles, that the electric field creates a unique dispersion of the charged droplets and that it can operate under...

Morphology of water electrosprays in the simple-jet mode

Experiments were conducted in order to study and characterize electrohydrodynamic atomization in the simple-jet mode for inviscid liquids. The operational window of this mode regarding the electric potential and liquid flow rate is presented. From the data it could be concluded that this mode can be divided by the characteristics of its breakup...

System for and method of delivering sprayed particles

A particle delivery device for producing a spray of particles in an ambient gas at an ambient pressure includes a storage volume for a liquid substance; a nozzle having an inlet and an outlet, the nozzle inlet being coupled to the storage volume in fluid communication, and an electric supply for providing an electric field between the nozzle...

Monodisperse water microdroplets generated by electrohydrodynamic atomization in the simple-jet mode

Experiments were conducted in order to investigate the influences of flow rate, applied voltage, and electric conductivity on droplet size and size distribution of water electrosprays in the simple-jet mode. The results show that the electric potential decreases significantly the relative standard deviation (RSD) of the spray size distribution,...

Reverse movement and coalescence of water microdroplets in electrohydrodynamic atomization

When a high voltage is applied to a liquid pumped through a needle, charged microdroplets can be formed, which are carried along the electric field lines. This phenomenon is called electrohydrodynamic atomization (EHDA), or simply electrospray. In this work we show that in the case of water, droplets may reverse their paths flying back toward...

Stability regime of pulse frequency for single event electrospraying

This study demonstrates that the hydrodynamic phenomena taking place inside the capillary limits the frequency range of voltage pulses for stable single event electrospraying (SEE), when the meniscus/cone size is defined by the inner diameter of the nozzle. For the analysis of SEE, we used a one-dimensional model describing the displacement and...

Experiments on single event electrospraying

In order to use electrospraying as an on demand deposition method, well defined and reproducible single electrospraying events have been studied. To generate a single electrospraying event, rectangular voltage pulses superimposed on a constant bias voltage were applied, and optimum settings of the bias dc voltage for starting such an event were...