A valveless micro impedance pump driven by electromagnetic actuation

Rinderknecht, Derek; Hickerson, Anna; Gharib, Morteza

doi:10.1088/0960-1317/15/4/026

Cited by 72 publications

(71 citation statements)

References 17 publications

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“…Perturbations of a compliant structure near a solid-solid boundary produce waves which are either destructed or reflected and added to the propagated wave in the opposite direction, creating a mainly unidirectional wave that can facilitate pumping. This is called impedance pumping as first noted by Liebau in 1954 [9] which has been applied to microfluidic applications [10,11,12].…”

Section: Valveless Impedance Pumpmentioning

confidence: 99%

An Experimental Investigation of Closed-Loop Impedance Pumping in a Compliant, Elastic Tube Millistructure by Variation of Perturbation Location

Garafolo¹,

Rich²,

Cymbal³

2018

JMDV

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Flow through a fluid-filled compliant tube microstructure subject to periodic perturbations is not widelyreported. An understanding of this phenomena is sought herein, as it may be useful for design of biological flows in microfluidic devices. An experiment conducted at the milli-scale to study the fluid flow produced within a closedloop network of tubing, having a compliant millitube section subject to periodic perturbations from a probe is presented, and provides a basis for a micro-scale experiment. To test the fluid response, the boundary of the compliant millitube section was periodically perturbed by the probe at a variety of frequencies at five locations. Experimental results demonstrate fluid circulation within the closed-loop of tubing, which varies significantly with the frequency and location of applied perturbations. Overall, the study herein illustrates a unique design for pumping which utilizes periodic vibrations of a compliant tube structure to create a net positive displacement of fluid.

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Section: Valveless Impedance Pumpmentioning

confidence: 99%

An Experimental Investigation of Closed-Loop Impedance Pumping in a Compliant, Elastic Tube Millistructure by Variation of Perturbation Location

Garafolo¹,

Rich²,

Cymbal³

2018

JMDV

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“…It is very simple in design and offers a promising new technique for producing and enhancing flow rates for both macro-and micro-scale devices (Avrahami and Gharib 2008;Rinderknecht et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of multi-stage open-loop impedance pump

Lee

Abakr

Woo

2017

Int J Mech Mater Eng

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Background: Impedance pump is a simple valveless pumping mechanism, which transports fluid through the mismatch of impedance in the system. Mismatch in impedance occurs when an asymmetrical periodic excitation is exerted on the elastic tube. Periodic asymmetrical excitation will then produce a unidirectional flow. Considering a multi-stage system with a single and constant power source, it is well expected that there would be pumping limitation to which the enhancement can reach. Methods: A multi-stage open-loop impedance pump is developed in the current work. The current work experimentally analyzes and evaluates the pumping performance of a multi-stage open-loop impedance pump, with emphasis on the flow rates induced and pumping limitation. Analyses of flow rates, pressure head and excitation frequencies are performed in its non-dimensional form. Results: Taking a single-stage system as benchmark, enhancement of 35 and 33.3% is shown in the flow rate and pressure head respectively for a two-stage system. Enhancement of 110 and 60% is shown in flow rate and pressure head of a three-stage system in comparison to the single-stage system. For four-stage system, however, only 27 and 46.7% increments are demonstrated in the flow rate and pressure head, respectively. Conclusions: The implementation of multi-stage system with single constant power input is demonstrated to be limited only to the three-stage system where the declined pumping performance is exhibited in a four-stage system.

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“…For instance, a VP system can generate an efficient net flow by controlling the parameters related to the driving force or tube materials. Therefore, VP has been studied extensively through experiments [10,19,20,21,34], analytical theories [1,26,32,36], and mathematical models [3,4,11,12,14,15,17,22,24,26,35,37].…”

Section: Introductionmentioning

confidence: 99%

Multidimensional Open System for Valveless Pumping

Jung¹,

Kim²,

Lee³

et al. 2015

Bulletin of the Korean Mathematical Society

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Abstract. In this study, we present a multidimensional open system for valveless pumping (VP). This system consists of an elastic tube connected to two open tanks filled with a fluid under gravity. The twodimensional elastic tube model is constructed based on the immersed boundary method, and the tank model is governed by a system of ordinary differential equations based on the work-energy principle. The flows into and out of the elastic tube are modeled in terms of the source/sink patches inside the tube. The fluid dynamics of this system is generated by the periodic compress-and-release action applied to an asymmetric region of the elastic tube. We have developed an algorithm to couple these partial differential equations and ordinary differential equations using the pressure-flow relationship and the linearity of the discretized Navier-Stokes equations. We have observed the most important feature of VP, namely, the existence of a unidirectional net flow in the system. Our computations are focused on the factors that strongly influence the occurrence of unidirectional flows, for example, the frequency, compression duration, and location of pumping. Based on these investigations, some case studies are performed to observe the details of the flow features.

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A valveless micro impedance pump driven by electromagnetic actuation

Cited by 72 publications

References 17 publications

An Experimental Investigation of Closed-Loop Impedance Pumping in a Compliant, Elastic Tube Millistructure by Variation of Perturbation Location

An Experimental Investigation of Closed-Loop Impedance Pumping in a Compliant, Elastic Tube Millistructure by Variation of Perturbation Location

Performance evaluation of multi-stage open-loop impedance pump

Multidimensional Open System for Valveless Pumping

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