Piezoelectric-fluid interaction finite element analysis of a valve-less piezoelectric pump

Abstract

In this paper, a new composite actuator, which consists of a bimorph piezoelectric plate and a metal cap, was proposed for micro-TAS (Total Analysis Systems) which is widely used for chemical, biological and medical devises. The main objective of this work is to verify the displacement amplification introduced by a new design of composite actuator. At first, the proposed discshaped composite actuator was modeled and the static deflection was compared with conventional ones which are monomorph, bimorph actuators and a composite actuator called "Moonie". Additionally, the proposed composite actuator was applied to a valve-less pump in a Y-shaped fluid channel and a piezoelectric-fluid interaction finite element simulation was performed. Computations demonstrated the superior performance of the new composite actuator compared with conventional ones.

Performance enhancement of a valveless pump driven by a noble piezoelectric composite actuator

“…The metal cap was 0.2-mm thick and had a clearance of 0.2 mm. Before discussing the experimental results, let us review the computational results for static deformation, which we published in a previous report [24]. Figure 2 shows fi nite element models for the four piezoelectric actuators.…”

“…We call this new actuator design the 'new Moonie actuator'. In our previous work [24], the superiority of the proposed composite actuator to conventional ones at the view point of static defl ection was verifi ed through fi nite element simulations. In the present work, the dynamic defl ection of the proposed composite actuator was examined experimentally.…”