Results 61 to 70 of about 109 (96)
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Computational study of parallel valveless micropumps
Sensors and Actuators B: Chemical, 2011Abstract An integrated study of parallel valveless micropumps is described which incorporates computations and a mathematical model. Two cylindrical pump chambers are driven out of phase and the circuit resistance is provided by an interconnecting pipe whose width is varied. A one-dimensional mathematical model, consistent with the pump configuration,
A. Azarbadegan +3 more
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Valveless flow reversal by a pH responsive supramolecular micropump
Chemical Communications, 2021Flow reversal in a valveless micropump was achieved via dynamic supramolecular interaction between beta-cyclodextrin (β-CD) and benzimidazole (BzI).
Mujeeb Alam +4 more
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Numerical design and performance of a valveless micropump
2008 International Conference on Advanced Technologies for Communications, 2008This paper presents design and numerically study performance of a valveless micropump. The micropump consists of two inlet channels, a pump chamber, and an outlet channel. These components are connected through a specific throat on one planar layer. A side of the pump chamber is enclosed by a vibrating plate which deforms volume of the pump chamber ...
Thien X. Dinh +3 more
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Multifield Analysis of a Piezoelectric Valveless Micropump
Volume 8: Mechanics of Solids, Structures and Fluids; Vibration, Acoustics and Wave Propagation, 2011Coupled multifield analysis of piezoelectrically actuated valveless-micropump MEMS devices are carried out for liquid transport applications. We consider the three-way coupling between electrical, mechanical and fluidic fields in such systems where actuator deflection causes fluid flow through a micropump.
Ersin Sayar, Bakhtier Farouk
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Valveless micropump driven by acoustic streaming
Journal of Micromechanics and Microengineering, 2013This paper describes two valveless micropumps built on a 260 µm thick PZT with 20 µm thick parylene acoustic Fresnel lenses with air cavities. The micropumps produce in-plane body force through acoustic streaming effect of high-intensity acoustic beam that is generated by acoustic wave interference.
Youngki Choe, Eun Sok Kim
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Parametric characterization of piezoelectric valveless micropump
Microsystem Technologies, 2011Experimental investigations are performed to determine the influence of electrical excitation and geometrical parameters on the performance of piezoelectric valveless micropumps fabricated on printed circuit board substrates. Strain gauges and shunt resistor are used in conjunction with a data acquisition system to form an effective transducer, capable
Parikshit Verma, Dhiman Chatterjee
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Conception and design of a thermal valveless micropump
SPIE Proceedings, 2005This paper describes the conception and design of a micropump for gas, with no moving or deformable parts, for use on the future sensor network system, which includes environment monitoring. This design is original because of the complete absence of moving parts for the pumping of gas. In fact, fluid movement was obtained by means of repetitive heating
G. Manzoni +6 more
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Flow and Performance Analysis of a Valveless Micropump
2018The flow behaviour and performance parameters of a diffuser-nozzle element of a valveless micropump have been investigated for different geometric and flow properties. When a fluctuating pressure is imposed on the inlet boundary of a diffuser-nozzle element, there is a net flow in diffuser direction due to the dynamic effect.
P. K. Das, A. B. M. T. Hasan
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Valveless Micropump with Saw-Tooth Microchannel
Key Engineering Materials, 2014The micropump is the executive component in a microfluidic chip which impels the sample to flow. Its performance directly affects the precision and reliability of Micro Total Analysis Systems (μTAS), and it also plays a key role in the targeting transport of trace substances.
Ying Hua Xu, Wei Ping Yan, Li Guo
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Analysis of valveless micropumps with inertial effects
Journal of Micromechanics and Microengineering, 2003Through flow field simplification, a set of differential equations governing the fluid flow and fluid–membrane coupling are obtained for a valveless micropump. The dimensional analysis on the equations reveals that the ratio of the inertial force of the fluid to the viscous loss is dependent on the size ratios among internal elements of the pump. For a
L S Pan, T Y Ng, X H Wu, H P Lee
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