A study on control of jet performance from electrostatic nozzle using organic solvents

An effect of applied electric potential and physico-chemical parameters on a droplet diameter has been analyzed numerically. Smaller droplets can be ejected from a nozzle by applying electrostatic potential between the nozzle and liquids. Although the droplets have been formed until the critical value of the electric potential, unstable liquid jets with multiple satellite droplets have been observed at higher electric potentials. The critical value of the electric potential is called as an onset voltage in this study. Equations for the onset voltage have been developed by many researchers. Since the developed equations are appropriate for only their cases, a numerical analysis has been performed in this study to calculate the droplet diameters and the onset voltages accurately by various functions such as a surface tension of liquid, a distance between a nozzle and electrode, an inside diameter of the nozzle, etc.