Ion drag electrohydrodynamic (EHD) micro-pumps under a pulsed voltage

Russel, M.K.; Selvaganapathy, P. Ravi; Ching, C.Y.

doi:10.1016/j.elstat.2016.05.003

Cited by 21 publications

(7 citation statements)

References 35 publications

(36 reference statements)

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“…In order to improve the performance of an ion‐drag micropumps, Russel et al. [23] used pulsed voltage signals. They determined the effect of various pulse voltage parameters such as pulse repetition rate and duty cycle with HFE 7100 as a working fluid on the pumping efficiency.…”

Section: Geometry and Arrangement Of Electrodementioning

confidence: 99%

“…Charge injection into/from dielectric solution can happen through field emission [42] or field ionization [43] and depends on the energy barrier that is set through the dielectric solution and the electrodes. In field emission, electrons tunnel through the fluid-electrodes interface, from the negative electrodes to the fluid [23]. Furthermore, in field ionization, electrons tunnel from the liquid molecules to the positive electrodes.…”

Section: Injection or Ion-drag Pumpingmentioning

confidence: 99%

“…The mechanism of conduction in EHD micropumps largely depends on the fluid impurities [23]. The conduction in a low electric field regime is common because of the positive and negative ions produced through dissociated molecules [21].…”

Section: Introductionmentioning

confidence: 99%

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A systematic overview of electrode configuration in electric‐driven micropumps

et al. 2022

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Accurate manipulation of fluids in microfluidic devices is an important factor affecting their functions. Since the emergence of microfluidic technology to transport fluids in microchannels, the electric field has been utilized as an effective dynamic pumping mechanism. This review attempts to provide a fundamental insight of the various electric-driven flows in microchannels and their working mechanisms as micropumps for microfluidic devices.Different electrokinetic mechanisms implemented in electrohydrodynamic-, electroosmosis-, electrothermal, and dielectrophoresis-based micropumps are discussed. A detailed description of different mechanisms is presented to provide a comprehensive overview on the key parameters used in electric micropumps. Furthermore, electrode configurations and their shapes in different micropumps are explored and categorized to provide conclusive information for the selection of efficient, simple, and affordable strategies to transport fluids in microfluidic devices. In this paper, recent theoretical, numerical and experimental investigations are covered to provide a better insight both on the operational mechanisms and strategies for lab-on-chip applications.

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Section: Geometry and Arrangement Of Electrodementioning

confidence: 99%

Section: Injection or Ion-drag Pumpingmentioning

confidence: 99%

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A systematic overview of electrode configuration in electric‐driven micropumps

et al. 2022

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“…Several EHD devices have been proposed in previous works. These works indicated that breaking the structural or electrical symmetry is important in extracting useful work as an EHD pump from isotopic phenomena [ 17 , 18 ]. These studies demonstrated the usefulness of EHD phenomena for an on-chip pumping source but did not discuss details of the design parameters owing to difficulties in observing high-speed phenomena.…”

Section: Introductionmentioning

confidence: 99%

Design of Electrohydrodynamic Devices with Consideration of Electrostatic Energy

et al. 2021

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The importance of actuators that can be integrated with flexible robot structures and mechanisms has increased in recent years with the advance of soft robotics. In particular, electrohydrodynamic (EHD) actuators, which have expandable integrability to adapt to the flexible motion of soft robots, have received much attention in the field of soft robotics. Studies have deepened the understanding of steady states of EHD phenomena but nonsteady states are not well understood. We herein observe the development process of fluid in a microchannel adopting a Schlieren technique with the aid of a high-speed camera. In addition, we analyze the behavior of fluid flow in a microchannel that is designed to have pairs of parallel plate electrodes adopting a computational fluid dynamics technique. Results indicate the importance of considering flow generated by electrostatic energy, which tends to be ignored in constructing and evaluating EHD devices, and by the body force generated by the ion-drag force. By considering these effects, we estimate the development process of EHD flow and confirm the importance of considering the generation of vortices and their interactions inside the microchannel during the development of EHD devices.

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“…Huang et al [19] reported that using electrostatic charging, finer oil droplets are generated for MQL applications. Electrostatic and electrohydrodynamic methods have been used in various industries for generating sprays of fine droplets for various applications such as inkjet printers [21,22], fuel injection [23], microfluidic systems [24] and, pharmaceuticals [25,26].…”

Section: Introductionmentioning

confidence: 99%

Electrohydrodynamic Atomization for Minimum Quantity Lubrication (EHDA-MQL) in End Milling Ti6Al4V Titanium Alloy

Bartolomeis

Shokrani

2020

JMMP

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Titanium alloy Ti6Al4V is a difficult-to-machine material which is extensively used in the aerospace and medical industries. Machining titanium is associated with a short tool life and low productivity. In this paper, a new cooling-lubrication system based on electrohydrodynamic atomization was designed, manufactured and tested and the relevant theory was developed. The major novelty of the system lies within the use of electrohydrodynamic atomization (EHDA) and a three-electrode setup for generating lubricant droplets. The system was tested and compared with that of flood, minimum quantity lubrication (MQL) and compressed air machining. The proposed system can extend the tool life by 6 and 22 times when compared with MQL and flood cooling, respectively. This is equivalent to more than 170 min tool life at 120 m/min cutting speed allowing for significant productivity gains in machining Ti6Al4V.

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Ion drag electrohydrodynamic (EHD) micro-pumps under a pulsed voltage

Cited by 21 publications

References 35 publications

A systematic overview of electrode configuration in electric‐driven micropumps

A systematic overview of electrode configuration in electric‐driven micropumps

Design of Electrohydrodynamic Devices with Consideration of Electrostatic Energy

Electrohydrodynamic Atomization for Minimum Quantity Lubrication (EHDA-MQL) in End Milling Ti6Al4V Titanium Alloy

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