Electro-hydrodynamics and kinetic modelling of polluted air flow activated by multi-tip-to-plane corona discharge

Meziane, M.; Eichwald, Olivier; Sarrette, Jean‐Philippe; Ducasse, Olivier; Yousfi, Mohammed; Marchal, Frédéric

doi:10.1063/1.4801879

Cited by 21 publications

(19 citation statements)

References 29 publications

(30 reference statements)

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“…The ions accelerate in the electric field and collide with neutral air molecules, resulting in momentum transfer represented by volumetric electrohydrodynamic force, which gives rise to bulk air movement commonly called as ion wind. The ion wind has been used in various airflow control applications [1][2][3] , cooling application [4][5][6][7] , propulsion technology [8][9][10] , micro-pump design 11,12 , precipitation filtering 13,14 , and electronic devices [15][16][17] . There are several methods generating electric-field driven ion wind and two principal approaches are reviewed below.…”

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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“…A complete description of the used model can be found in Ref. [8]. We reproduce here some of the main model characteristics for clarity and self-consistency of the present paper.…”

Section: Model and Simulation Conditionsmentioning

confidence: 99%

“…The specific formalisms used for the source terms calculation and their validation are discussed in detail in Ref. [8]. Source terms are applied each 0.1 ms during 150 ns, which correspond to a typical DC corona discharge frequency (∼10 kHz) and duration.…”

Section: Model and Simulation Conditionsmentioning

confidence: 99%

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Electro-Hydrodynamics and Kinetic Modeling of Dry and Humid Air Flows Activated by Corona Discharges

Sarrette

Eichwald

Marchal

et al. 2016

Plasma Sci. Technol.

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The present work is devoted to the 2D simulation of a point-to-plane Atmospheric Corona Discharge Reactor (ACDR) powered by a DC high voltage supply. The corona reactor is periodically crossed by thin mono filamentary streamers with a natural repetition frequency of some tens of kHz. The study compares the results obtained in dry air and in air mixed with a small amount of water vapour (humid air). The simulation involves the electro-dynamics, chemical kinetics and neutral gas hydrodynamics phenomena that influence the kinetics of the chemical species transformation. Each discharge lasts about one hundred of a nanosecond while the postdischarge occurring between two successive discharges lasts one hundred of a microsecond. The ACDR is crossed by a lateral dry or humid air flow initially polluted with 400 ppm of NO. After 5 ms, the time corresponding to the occurrence of 50 successive discharge/post-discharge phases, a higher NO removal rate and a lower ozone production rate are found in humid air. This change is due to the presence of the HO2 species formed from the H primary radical in the discharge zone.

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“…the distance between the bottom electrode and the substrate. 11,17,18 The used chamber and electrode design was entirely different from such well studied systems equipped by remote low-temperature plasma and operated under atmospheric pressure as jet systems, [27][28][29] corona discharge systems, [30][31][32] microwave discharge systems. [33][34][35] In the cases of all above mentioned systems, plasma (i) was spatial inhomogeneous and (ii) freely collapsed in the chamber area between the discharge area and the substrate.…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution of the electrical potential and ion concentration in the downstream area of atmospheric pressure remote plasma

et al. 2014

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This paper presents the results from an experimental study of the ion flux characteristics behind the remote plasma zone in a vertical tube reaction chamber for atmospheric pressure plasma enhanced chemical vapor deposition. Capacitively coupled radio frequency plasma was generated in pure He and gas mixtures: He–Ar, He–O2, He–TEOS. We previously used the reaction system He–TEOS for the synthesis of self-assembled structures of silicon dioxide nanoparticles. It is likely that the electrical parameters of the area, where nanoparticles have been transported from the synthesis zone to the substrate, play a significant role in the self-organization processes both in the vapor phase and on the substrate surface. The results from the spatial distribution of the electrical potential and ion concentration in the discharge downstream area measured by means of the external probe of original design and the special data processing method are demonstrated in this work. Positive and negatives ions with maximum concentrations of 106–107 cm−3 have been found at 10–80 mm distance behind the plasma zone. On the basis of the revealed distributions for different gas mixtures, the physical model of the observed phenomena is proposed. The model illustrates the capability of the virtual ion emitter formation behind the discharge gap and the presence of an extremum of the electrical potential at the distance of approximately 10−2–10−1 mm from the grounded electrode.

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Electro-hydrodynamics and kinetic modelling of polluted air flow activated by multi-tip-to-plane corona discharge

Cited by 21 publications

References 29 publications

Dual-pin electrohydrodynamic generator driven by alternating current

Dual-pin electrohydrodynamic generator driven by alternating current

Electro-Hydrodynamics and Kinetic Modeling of Dry and Humid Air Flows Activated by Corona Discharges

Spatial distribution of the electrical potential and ion concentration in the downstream area of atmospheric pressure remote plasma

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