Simulation studies of valve-less elements and experiment testing for piezoelectric micropump

In order to overcome the actuality of low output performance and efficiency of the micropump with diffuser/nozzle microchannels, the micropump with saw-tooth microchannels has been put forward. Through comparing to the simulation datum between diffuser/nozzle and saw-tooth microchannels, the result show that the flow-field changed along with the Reynolds and what about the eddies coming; the micropump performance with saw-tooth microchannels should be better than that of diffuser/nozzle microchannels because of the presence of the dentiform angle that increased the flow area and reduced the pressure loss. The maximum pressure head and the flow rate of the two micropumps have been tested with sine, square and triangle driving signals according to different voltages. The results show that the flow rate and pressure values of the micropump with saw-tooth microchannels is higher than that of traditional microchannels. So the performance of the micropump with saw-tooth microchannels will be inchanced greatly.