Abstract
In this study, a valveless pump was successfully designed and fabricated for the purpose of medium transportation. Different from traditional pumps, the newly designed pump utilizes an actuated or a deflected membrane, and it serves as the function of a check valve at the same time. For achieving the valveless property, an inlet or outlet port positioned in an upper- or lower-layer thin membrane was designed to be connected to an entrance or exit channel. Theoretical analysis and numerical simulation were conducted simultaneously to investigate the large deformation characteristics of the membranes and to determine the proper location of the inlet or outlet port on the proposed pump. Then, the valveless pump was fabricated on the basis of the proposed design. In the experiment, the maximum flow rate of the proposed pump exceeded 12.47 mL/min at a driving frequency of 5.0 Hz and driving pressure of 68.95 kPa.
Highlights
A new valveless micropump is designed to transport media that utilizes an actuated or a deflected membrane, and it serves as the function of a check valve at the same time
This design leads to an actuated position of the inlet port is crucial for the proposed valveless pump
The pump body words, this membrane exhibits the functions of a reciprocating diaphragm and a check consists of a fluidic chamber and two fluidic channels
Summary
The benefits of dynamic valves in micropumps include high operating pressure, good flow direction, and minimal backflow [7,22]. These valves can be affected by the working fluids containing cells or particles that are prone to damage or clogging [23]. The motivation of this study is to design an fabricated, low-cost, less leakage, long-term working, and high volumetric flow rate valveless pump extensively for the applications of intravenous infusion. A new valveless micropump is designed to transport media that utilizes an actuated or a deflected membrane, and it serves as the function of a check valve at the same time. The proposed valveless micropump was tested to experimentally investigate its pumping performance
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