Bipolar corona discharge based air flow generation with low net charge

Dau, Van Thanh; Dinh, Thien Xuan; Terebessy, Tibor; Thanh, Tung Bui

doi:10.1016/j.sna.2016.03.028

Cited by 36 publications

(23 citation statements)

References 69 publications

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“…In this paper, we present a hybrid configuration of ion wind corona discharge where a pair of electrodes arranged in parallel connects to an AC power as described in Figure 2. The presented configuration is a further development expanding on our recent work [51][52][53][54][55][56][57] and possesses several configurational characteristics of DCD and DBD approaches. This configuration allows both negative and positive charges to simultaneously move away from the device in the same direction in parallel with the electrodes, and generate ion wind for both constant and transient applied voltages.…”

Section: Introductionmentioning

confidence: 99%

Dual-pin electrohydrodynamic generator driven by alternating current

Dau

Dinh

Tran

et al. 2018

Experimental Thermal and Fluid Science

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We report a unique alternating current (AC) driven corona based air-flow generator using symmetrically arranged electrodes. Unlike the conventional configuration where one electrode generates charged ions moving towards the reference electrode, this configuration allows both negative and positive charges to simultaneously move away from the device and generate ion wind in parallel with the electrodes. In comparison with the direct current (DC) driven corona generator, the time oscillating AC field allows the device a better stabilization owing to the independence of ion wind strength from the inter-electrode spacing. Our results by both simulation and experiment showed that when the AC frequency exceeds a threshold value of 1100 Hz, the electric field at the electrode tips is determined dominantly by the charge cloud created in the previous half-cycle, resulting in stronger net electric field and thus stronger ion wind. In addition, the electrode separation in the AC driven corona based generator is less critical above the frequency threshold, yielding a more robust design with minimized susceptibility to manufacturing tolerances and impurities on the electrodes. Moreover, lower voltage levels of the AC driven system allow simpler and more economical design in the high voltage circuit of the AC generator.

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Section: Introductionmentioning

confidence: 99%

Dual-pin electrohydrodynamic generator driven by alternating current

Dau

Dinh

Tran

et al. 2018

Experimental Thermal and Fluid Science

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“…The resistance variations of hotwires were then converted to the velocity of ion wind by comparing the heat transfer coefficient of forced convection,

from generated ion winds with that of natural convection

from a still air [ 44 ], where

is the thermal conductivity, Ra is the Rayleigh number, d is the effective diameter of the hotwire, and

is the Reynolds number. The process was carried out using an subroutine C-code, which has been detailed in our recent publications [ 45 , 46 , 47 , 48 ]. The average velocities calculated from output voltage are plotted in Figure 7 b.…”

Section: Resultsmentioning

confidence: 99%

Transient Characteristics of a Fluidic Device for Circulatory Jet Flow

Phan

Dinh

Bui

et al. 2018

Sensors

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In this paper, we report on the design, simulation, and experimental analysis of a miniaturized device that can generate multiple circulated jet flows. The device is actuated by a lead zirconate titanate (PZT) diaphragm. The flows in the device were studied using three-dimensional transient numerical simulation with the programmable open source OpenFOAM and was comparable to the experimental result. Each flow is verified by two hotwires mounted at two positions inside each consisting chamber. The experiment confirmed that the flow was successfully created, and it demonstrated good agreement with the simulation. In addition, a prospective application of the device as an angular rate sensor is also demonstrated. The device is robust, is minimal in size, and can contribute to the development of multi-axis fluidic inertial sensors, fluidic amplifiers, gas mixing, coupling, and analysis.

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“…An electric field caused by a high voltage isolated from the sampling collector is applied between two discharge electrodes to generate ionized wind. By the effect of the electric field and bipolar ionized wind, particles are neutralized and gently shifted toward the collection cavity of the channel [8]- [10]. Since neither electrode nor sampling chip is installed inside the channel, there is not any obstacle through the channel.…”

Section: Working Principlementioning

confidence: 99%

Computational and experimental study on ion wind scheme based aerosol sampling for biomedical applications

Thanh¹,

Dinh²,

Tran³

et al. 2017

2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS)

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In this paper, an efficient electrostatic particle sampling system is developed based on the neutralized ion wind. Compare with the conventional schemes where unipolar ion is used to charge the airborne sample and the sampling stage is fixed as a part of high voltage circuit, the new approach allows sampling stage to be electrically floated and adds insignificant charge to the bioaerosol, thus reduces damages to the microorganisms while provides design flexibility and good collecting efficiency. The approach is suitable for the combination with a microfluidic interface to develop complex aerosol-tohydrosol bio-samplers.

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Bipolar corona discharge based air flow generation with low net charge

Cited by 36 publications

References 69 publications

Dual-pin electrohydrodynamic generator driven by alternating current

Dual-pin electrohydrodynamic generator driven by alternating current

Transient Characteristics of a Fluidic Device for Circulatory Jet Flow

Computational and experimental study on ion wind scheme based aerosol sampling for biomedical applications

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