Development of liquid pumping devices using vibrating microchannel walls

Ogawa, Junya; Kanno, Isaku; Kotera, Hidetoshi; Wasa, Kiyotaka; Suzuki, Takao

doi:10.1016/j.sna.2009.04.004

Cited by 49 publications

(36 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their numerical model incorporated direct coupling between solid deforming boundaries and the fluid by means of a deforming mesh according to Arbitrary Lagrangian Eulerian implementation, and 2-D unsteady Stokes equations to solve for the flow realized by the traveling-wave actuator in the channel. Very recently, Ogawa et al (2009) fabricated a valveless liquid pumping device by traveling waves beneath the ceiling wall induced by applying sinusoidal voltages with a phase difference of 2p/3 to adjacent top electrodes (see Fig. 2).…”

Section: Dynamic Micropumpsmentioning

confidence: 99%

Steady and unsteady flow analysis in microdiffusers and micropumps: a critical review

Nabavi

2009

Microfluid Nanofluid

View full text Add to dashboard Cite

In recent research, there has been a growing interest in the analysis of flow through microdiffusers and micropumps in order to characterize and optimize the performance of these devices. In this review, the recent advances in the numerical and experimental analysis of the steady and pulsating flows through microdiffusers and valveless micropumps are surveyed. The differences between the performance of microdiffusers and micropumps in steady and unsteady flow regimes are described. Qualitative and quantitative discussions of the effects of different design parameters on the performance of microdiffusers and valveless micropumps in both steady and unsteady flow regimes along with the contradictory results reported in the literature in this regard are provided. In addition, a summary of the latest micropump technologies along with the advantages and disadvantages of each mechanism with the emphasis on the innovative and lessreviewed micropumps are presented. Two important types of fixed microvalves, as part of valveless micropumps are described in details. Experimental flow visualization of steady and pulsating flows through microdiffusers and micropumps as a useful tool for better understanding the underlying micro-fluid dynamics is discussed. The present review reveals that there are many possible areas of research in the field of steady and unsteady flows through microdiffusers and micropumps in order to understand the effects of all important design parameters on the performance of these devices. List of symbols uVelocity in x direction (m/s) v Velocity in y direction (m/s) u max Maximum velocity in x direction (m/s) Q Volumetric flow rate (m 3 /s) Q net Net flow rate (m 3 /s) q Density (kg/m 3 ) p Pressure (Pa) p 0 Static pressure (Pa) t Time (s) x Axial position (m) y Transverse position (m) T Excitation period (s) l Shear viscosity (kg/m s) m Kinematic viscosity (m 2 /s) Re = u max D h /m Reynolds number St = x D h /u max Strouhal number Ro = x D h 2 /m = Re.St Roshko number Wo = D h /d Womersley number V Volume-average velocity (m/s) P Maximum pressure (Pa) Dp Frictional pressure drop (Pa) g Diffuser efficiency g max Maximum diffuser efficiency n d Total pressure loss coefficient in the diffuser direction n n Total pressure loss coefficient in the nozzle direction

show abstract

Section: Dynamic Micropumpsmentioning

confidence: 99%

Steady and unsteady flow analysis in microdiffusers and micropumps: a critical review

Nabavi

2009

Microfluid Nanofluid

View full text Add to dashboard Cite

show abstract

“…Also, new fabrication techniques such as soft lithography, hot embossing, and injection molding as well as laser ablation, are being pursued. Some actuation mechanisms, especially in the non-mechanical micropumps, such as surface acoustic streaming [8], bubble expansion [9] and laser beam radiation [10] etc., have been used for different ranges of volumetric dosing from hundreds of nanoliters/min to a few microliters/min. The reliability and integration of micropumps is a serious, important concern due to their applications in biomedical fields and life sciences.…”

Section: Introductionmentioning

confidence: 99%

An Electromagnetically-Actuated All-PDMS Valveless Micropump for Drug Delivery

Zhou

Amirouche

2011

Micromachines

View full text Add to dashboard Cite

This paper presents the fabrication process of a single-chamber planar valveless micropump driven by an external electromagnetic actuator. This micropump features a pair of micro diffuser and nozzle elements used to rectify the fluid flow, and an elastic magnetic membrane used to regulate the pressure in the enclosed fluid chamber. Polydimethylsiloxane (PDMS) is used as the main construction material of this proposed micropump, including the structural substrate and the planar actuation membrane embedded with a thin micro magnet. Both the Finite Element Method and experimental analysis are used to assess the PDMS-membrane actuation under the applied electromagnetic forces and characterize the pump performance at variable working conditions. The resonant frequency of this micropump is identified experimentally and de-ionized (DI) water is loaded to account for the coupling effects of the working fluid. The experimental data was used to demonstrate the reliability of flow rates and how it can be controlled by consistently adjusting the driving frequencies and currents. The proposed micropump is capable of delivering a maximum flow rate of 319.6 μL/min and a maximum hydrostatic backpressure of 950 Pa (9.5 cm H 2 O). The planar design feature of the pump allows for potential integration of the pump with other PDMS-based microfluidic systems for biomedical applications.

show abstract

“…valveless pump based on a Lamb wave was proposed by Ogawa et al [80]. The liquid in the microchannel was transported by generating a travelling wave on the channel wall, which was composed of a piezoelectric PZT thin film actuator array.…”

Section: Acoustic Wave Based Microfluidics and Lab-on-a-chip 535mentioning

confidence: 99%