FORMATION OF MOLTEN SN AND SN-PB DROPLETS IN MAGNETOHYDRODYNAMIC PUMPS
In the present paper, an electromagnetic pump and nozzle are introduced and characterized, preparing an intermittent flow of molten Sn and Sn-Pb. In the designed nozzle, Eddy-currents inside the melt and the alternating electromagnetic forces combine and create a force to produce on-demand droplets. Pulse characteristics, including voltage, duty cycle, and frequency, are altered along with melt characteristics, including alloy composition and temperature. Droplets were produced at 48 conditions, and the shape, weight, and production rate were measured. Results indicate that owing to its higher surface tension; Sn produces larger and heavier droplets than Sn-Pb alloy at all identical test conditions. While the pulse parameters didn't significantly change the droplet weight, their increase resulted in an increasing droplet production rate. The effect of temperature was different at various conditions since it reduces the surface energy and increases electrical resistance and fluidity.
Electromagnetic Pump, Drop-On-Demand, Metal Droplet