# Research on Valveless Piezoelectric Pump Based on Coriolis Effect

## TL;DR

This paper studies a valveless piezoelectric pump based on the Coriolis effect, focusing on how the design of arc-shaped tubes affects flow rate.

## Contribution

The study introduces a new layout of arc-shaped tubes that maximizes flow rate in valveless piezoelectric pumps.

## Key findings

- VLPPADA achieved the highest flow rate of 1.72 mL/min under specific driving conditions.
- The flow rate of VLPPADA is directly proportional to the base radius and width of the arc-shaped tube.
- Three layout modes of arc-shaped tubes were analyzed and fabricated using 3D printing.

## Abstract

In previous studies, a valveless piezoelectric pump with arc-shaped tubes (VPPAST) based on the Coriolis Effect was proposed. To promote the application of VPPAST in the field of navigation and guidance, it is vital to further explore the influences of the layout and structural parameters of arc-shaped tubes on the flow rate. Accordingly, in this study, the analysis of flow characteristics of fluid in arc-shaped tubes was conducted, and the velocity difference between the clockwise and counterclockwise flow of the liquid was reduced. Eventually, the flow equations of three layout modes of arc-shaped tubes were established. VPPAST with anomalous-direction arc-shaped tubes, single-arc-shaped tube, and same-direction arc-shaped tubes were produced using 3D printing technology. In addition, the valveless piezoelectric pump with the anomalous-direction arc-shaped tubes (VLPPADA) with different parameter flow tubes were also fabricated. Based on the resultant flow rates of each piezoelectric pump, it was demonstrated that the flow rate of the VLPPADA was the highest under the same driving conditions, and the flow rate can be determined as 1.72 mL/min when the driving voltage was set as 160 V at 14 Hz. It indicated that the pump flow rate of VLPPADA was directly proportional to the base radius and width of the arc-shaped tube.