Abstract
The effect of channel geometry on the discharge pressure of valve-less micro-pump with a diffuser/nozzle shaped channel was investigated. The micro-pump channnels of various angles of 30, 60, 90 degree between main channel and connecting channel to the chamber with actuator were prepared. The measured discharge pressures were rearranged using dimensionless numbers as head coefficient y, and compared the frequency characteristics for various pump channels. As a result, higher head coefficient indicated for the angle of 30 degree which had higher junction loss from the chamber to the inlet channel.
