Enhancement in Gas Pumping in a Square Channel With Two-Stage Corona Wind Generator

Mazumder, A. K. M. Monayem Hossain; Lai, F. C.

doi:10.1109/tia.2013.2290864

Cited by 45 publications

(3 citation statements)

References 31 publications

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“…Their work includes a detailed analysis of literature dealing with ionic wind heat transfer enhancement in channels. Within the literature, there exists disagreement about whether adding multiple EHD pumps would enhance heat transfer: additional EHD pumps enhance cooling by producing more flow [132,133], but can also reduce cooling by acting as a barrier to the bulk flow [134]. Furthermore, the ionic wind jets produced by the EHD pumps start to interfere with each other, which causes the total heat transfer rate to plateau as additional EHD pumps are incorporated.…”

Section: Ehd For Cooling and Thermal Managementmentioning

confidence: 99%

Recent advances in electrohydrodynamic pumps operated by ionic winds: a review

Johnson

2017

Plasma Sources Sci. Technol.

117

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An ionic or electric wind is a bulk air movement induced by electrohydrodynamic (EHD) phenomena in a gas discharge. Because they are silent, low power, respond rapidly, and require no moving parts, ionic wind devices have been proposed for a wide range of applications, ranging from convection cooling and food drying to combustion management. The past several decades have seen the area grow tremendously leading to a number of new actuation strategies and devices that can be incorporated into various applications. In this review, we discuss the physics of ionic winds and recent developments of the past five years that have pushed the field forward, focusing on the development on bulk air-moving devices we term EHD pumps. We then highlight the ongoing challenges with transitioning ionic wind technologies to the market place, from issues that affect robustness to practical implementation, and point to areas where future research could have an impact on the field.

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Section: Ehd For Cooling and Thermal Managementmentioning

confidence: 99%

Recent advances in electrohydrodynamic pumps operated by ionic winds: a review

Johnson

2017

Plasma Sources Sci. Technol.

117

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“…Sensing numerical studies of EHDs to approximate partial differential equations) have been presented for most ion wind configurations, for example, in point-to-plane [15] and in point-to-grid [59]. Al-Hamouz [60] used adaptive meshing to analyze a bipolar ionized field, Cagnoni et al [61] and Kim et al [62] simulated the microscopic energy conversion process in the drift region, and Adamiak [63] provided a quick review of a simulation of precipitation.…”

Section: B Simulation Setupmentioning

confidence: 99%

Ion Wind Generator Utilizing Bipolar Discharge in Parallel Pin Geometry

Dau

Dinh

Terebessy³

et al. 2016

IEEE Trans. Plasma Sci.

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We present a simple and efficient airflow generator utilizing the effect of ion wind by generating simultaneously both the positive and negative ions from two sharp electrodes mounted parallel to each other. The unique bipolar geometrical setup eliminates the effect of space charge by the high recombination rate of oppositely charged ions. The two-electrode arrangement is symmetrical, where the electrode creating charged ions of one polarity also serves as the reference electrode to establish the electric field required for ion creation by the opposite electrode, and vice versa. Unlike the conventional setup, with a single electrode generating ion wind with movement toward the reference electrode, in this configuration the air movement is parallel to the electrodes, and is directed away from the device. The airflow behavior is studied by both experiments and numerical simulation. The ion wind speed has a linear relationship with the square root of the discharge current, U ∝ √ I, and its measured values agree well with simulation. The characterization of the discharge current-voltage relationship was derived from mathematical processing in the general formThe ion wind speed and the current-voltage characteristics depend on the interspace between the electrodes and the electrode geometry. An ion wind speed on the order of ms −1 is created with a microampere discharge current, resulting in a total net charge of only several femtoampere. The proposed configuration is beneficial in minimizing the power consumption of the system, and in enabling air recirculation for airflow control applications, cooling applications, propulsion technology, and micropump design, especially for the applications where neutralized ion wind flow is required.Index Terms-Bipolar corona discharge, electrohydrodynamics, ion wind, parallel pin.0093-3813 of Engineering and Technology, VNUH. He has authored or co-authored more than 60 scientific articles and seven inventions. His current research interests include 3-D system integration technology and MEMS-based sensors, actuators, and applications.

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“…For this approach, various electrode configurations have been published, including point-to-ring [18][19][20][21] , point-to-plane [22][23][24][25][26] , point-to-grid [27][28][29][30] , or wire-to-plate [31][32][33] . Recent works have shown further improvements on ion wind generation, including the use of alternating negative/positive discharge 34,35 , multiple electrodes 36 , and multiple stages 37,38 .…”

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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Enhancement in Gas Pumping in a Square Channel With Two-Stage Corona Wind Generator

Cited by 45 publications

References 31 publications

Recent advances in electrohydrodynamic pumps operated by ionic winds: a review

Recent advances in electrohydrodynamic pumps operated by ionic winds: a review

Ion Wind Generator Utilizing Bipolar Discharge in Parallel Pin Geometry

Dual-pin electrohydrodynamic generator driven by alternating current

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