Working principle and performance of the dynamic micropump

Gerlach, Torsten; Wurmus, Helmut

doi:10.1109/memsys.1995.472576

Cited by 55 publications

(58 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conventional valves in microfluidics systems are subject to mechanical failure and, in the case of biological fluids, present further risk of malfunction due to clogging or to damage sensitive biomolecules. Current valveless pumping techniques mainly consist of peristaltic [2][3][4][5] and reciprocating diaphragm pumps relying on diffusers [6][7][8][9][10]. These systems are often fabricated on a substrate through the use of soft lithography on polymeric materials because they are flexible and allow the form and features of these devices to be created and remain functionally sound.…”

Section: Introductionmentioning

confidence: 99%

A valveless micro impedance pump driven by electromagnetic actuation

Rinderknecht¹,

Hickerson²,

Gharib³

2005

J. Micromech. Microeng.

View full text Add to dashboard Cite

Over the past two decades, a variety of micropumps have been explored for various applications in microfluidics such as control of pico-and nanoliter flows for drug delivery as well as chemical mixing and analysis. We present the fabrication and preliminary experimental studies of flow performance on the micro impedance pump, a previously unexplored method of pumping fluid on the microscale. The micro impedance pump was constructed of a simple thin-walled tube coupled at either end to glass capillary tubing and actuated electromagnetically. Through the cumulative effects of wave propagation and reflection originating from an excitation located asymmetrically along the length of the elastic tube, a pressure head can be established to drive flow. Flow rates were observed to be reversible and highly dependent on the profile of the excitation. Micro impedance pump flow studies were conducted in open and closed circuit flow configurations. Maximum flow rates of 16 ml min −1 have been achieved under closed loop flow conditions with an elastic tube diameter of 2 mm. Two size scales with channel diameters of 2 mm and 250 µm were also examined in open circuit flow, resulting in flow rates of 191 µl min −1 and 17 µl min −1 , respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

A valveless micro impedance pump driven by electromagnetic actuation

Rinderknecht¹,

Hickerson²,

Gharib³

2005

J. Micromech. Microeng.

View full text Add to dashboard Cite

show abstract

“…So far, however, very few reports have been found to deepen the knowledge and understanding of this subject. Although discussions about the matching problem between driving frequency and driving voltage have been made by Stemme [1], Gerlach [19] and later comers, there is still a lot of work left for people to explore on the valveless piezoelectric pump with cone-shaped tubes in the view of energy matching, energy flow and energy balance, which may also become a new research direction, even a hotspot, in the near future.…”

Section: Brief Summarymentioning

confidence: 99%

“…In 1995, Gerlach, et al [19], developed a valveless piezoelectric micro-pump with tapered flow tubes by using MEMS technology on a silicon plate. The micro-tapered flow tube using MEMS technology on a silicon substrate is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Advances in Valveless Piezoelectric Pump with Cone-shaped Tubes

Zhang

Wang

Huang

2017

Chin. J. Mech. Eng.

View full text Add to dashboard Cite

This paper reviews the development of valveless piezoelectric pump with cone-shaped tube chronologically, which have widely potential application in biomedicine and micro-electro-mechanical systems because of its novel principles and deduces the research direction in the future. Firstly, the history of valveless piezoelectric pumps with cone-shaped tubes is reviewed and these pumps are classified into the following types: single pump with solid structure or plane structure, and combined pump with parallel structure or series structure. Furthermore, the function of each type of cone-shaped tubes and pump structures are analyzed, and new directions of potential expansion of valveless piezoelectric pumps with cone-shaped tubes are summarized and deduced. The historical argument, which is provided by the literatures, that for a valveless piezoelectric pump with cone-shaped tubes, cone angle determines the flow resistance and the flow resistance determines the flow direction. The argument is discussed in the reviewed pumps one by one, and proved to be convincing. Finally, it is deduced that bionics is pivotal in the development of valveless piezoelectric pump with cone-shaped tubes from the perspective of evolution of biological structure. This paper summarizes the current valveless piezoelectric pumps with cone-shaped tubes and points out the future development, which may provide guidance for the research of piezoelectric actuators.

show abstract

“…The opening angles of these nozzle/diffuser elements were small, normally less than 20 o and the diffuser direction was the positive flow direction. A different type of nozzle/diffuser elements fabricated in silicon using anisotropic wet etching was presented in 1995 [24,25]. As shown in Fig.…”

Section: Figure 21 Reciprocating Displacement Micropumps With Differementioning

confidence: 99%

Valveless piezoelectric micropump for fuel delivery in direct methanol fuel cell (DMFC) devices

Zhang

Wang

2005

Journal of Power Sources

View full text Add to dashboard Cite

Presented in this dissertation is the study of a novel fuel delivery system combined with miniaturized direct methanol fuel cell (DMFC). The core component of this system is a valveless micropump driven by ring-type piezoelectric bending actuator. By applying an alternating electrical field across the actuator, the resultant reciprocating movement of the pump diaphragm can be converted into pumping effect. Nozzle/diffuser elements are used to direct the flow. To make the power system applicable for portable electronic devices, the micropump needs to meet some specific requirements: low power consumption but sufficient fuel flow rate. In this study, both theoretical and experimental methods have been used to investigate the effects of materials properties, actuator dimensions, driving voltage, driving frequency, nozzle/diffuser dimension, and other factors on the performance of the whole system. As a result, a viable design of micropump system for fuel delivery in DMFC devices has been achieved and some further improvements are suggested.In the beginning of this dissertation, the history, working principle, types, and current research status of both fuel cell and micropump are reviewed. Following this comprehensive introduction, the research objective to develop a novel portable power system that combines fuel cell technology and micropump technology is presented. To help design such a system, a series of analytical models are established to estimate the deflection, volume change, flow rate, and power iv consumption of the micropump. Both finite element method (FEM) and experimental method are applied to verify the models. Based on the analytical analysis, material properties and dimensions of the micropump actuator are optimized to obtain maximum flow rate and minimum power consumption. Later a separated micropump prototype has been fabricated and tested. It is observed that the performance of a DMFC device is improved by using this micropump to supply fuel. In addition, the electrochemical impedance analysis of this fuel cell device is conducted to try to understand the reasons for the performance improvement. Finally, the accomplishments of this study are summarized and future perspective is provided.v

show abstract

Working principle and performance of the dynamic micropump

Cited by 55 publications

References 5 publications

A valveless micro impedance pump driven by electromagnetic actuation

A valveless micro impedance pump driven by electromagnetic actuation

Advances in Valveless Piezoelectric Pump with Cone-shaped Tubes

Valveless piezoelectric micropump for fuel delivery in direct methanol fuel cell (DMFC) devices

Contact Info

Product

Resources

About