Design and Simulation of Valveless Piezoelectric Micropump

In this paper some discrete parts of a valveless p iezoelectric micropump for drug delivery system is designed and simulated. The core components of the micropump are actuator unit that converts the reciprocating movement of a diaphragm actuated by a piezoelectric actuator into a pumping effect and Nozzle/diffuser elements that are used to direct the flow from inlet to outlet. Simulations are performed for actuator unit and diffuser/nozzle element individually, using Comsol software. The simulation results show that displacement of PZT actuator is directly proportional to the applied electric field. Flow is greater at contraction and lower at expansion for the diffuser/nozzle elements.