Characteristics of ultrasonic suction pump without moving parts

If an ultrasonically vibrating pipe is dipped into a liquid, the liquid is pumped up inside the pipe. We found in a previous study that the maximum pressure was improved from 1 kPa to 7.2 kPa if the end of the pipe was installed on a plate with a small gap. In this study, the configuration is modified for a practical design in which a still pipe is located at a right angle to a piston-vibrated surface. We investigate the difference in the pump characteristics between the former and new configurations. Our experiments show that a maximum pressure of 20.6 kPa is obtained by optimizing the inner and outer diameters of the pipe as well as the gap between the pipe end and the vibrator