Performance analysis of valveless piezoelectric pump with dome composite structures

Area of Science:

• Biomedical Engineering
• Fluid Dynamics
• Materials Science

Background:

• Valveless piezoelectric pumps are crucial for drug delivery systems.
• Severe reflux in these pumps limits their output performance.
• Novel structural modifications are needed to enhance pump efficiency.

Purpose of the Study:

• To reduce reflux in valveless piezoelectric pumps.
• To improve the output performance of these pumps.
• To investigate the efficacy of dome composite structures for enhanced pump function.

Main Methods:

• Design and simulation of dome composite structures within the pump chamber using CFX software.
• Parametric study involving dome length, trapezoidal angle, and rounded corner.
• Fabrication of prototypes and experimental testing of output flow rate and pressure.

Main Results:

• Optimized dome composite structures significantly reduced reflux and improved performance.
• Maximum output flow rate reached 220.6 ml/min.
• Maximum output pressure achieved was 670.0 Pa with high precision (5.85% variance from simulation).

Conclusions:

• The designed dome composite structures effectively reduce reflux in valveless piezoelectric pumps.
• The study demonstrates a significant improvement in output flow rate and pressure.
• The findings validate the effectiveness of the novel structural designs for advanced drug delivery applications.