scholarly journals An Experimental Study on Ionic Wind Visualization in Needle-Plate Electrode System by means of Laser-Induced Phosphorescence of Vapor-Phase Biacetyl Tracer

2005 ◽  
Vol 25 (Supplement2) ◽  
pp. 63-66
Author(s):  
Kentaro AOYAGI ◽  
Yu KITAHARA ◽  
Yoko OHKUBO ◽  
Ryu-ichiro OHYAMA
Keyword(s):  
Experimental Study ◽  
Vapor Phase ◽  
Electrode System ◽  
Ionic Wind ◽  
Plate Electrode

scholarly journals Electrohydrodynamic Drying of Chinese Wolfberry in a Multiple Needle-to-Plate Electrode System

Foods ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 152 ◽  
Author(s):  
Jiabao Ni ◽  
Changjiang Ding ◽  
Yaming Zhang ◽  
Zhiqing Song ◽  
Xiuzhen Hu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Diffusion Coefficient ◽  
Great Influence ◽  
Moisture Diffusion ◽  
Electrode System ◽  
Ionic Wind ◽  
Drying Characteristics ◽  
Plate Electrode ◽  
Effective Moisture ◽  
Disintegration Index

In order to systematically and comprehensively investigate electrohydrodynamic (EHD) drying characteristics and mechanisms in a multiple needle-to-plate electrode system, drying experiments of Chinese wolfberry were conducted by blocking ionic wind and changing needle spacing in a multiple needle-to-plate electrode system. Drying characteristics, quality parameters, and the microstructure of Chinese wolfberry fruits were measured. Results show that ionic wind plays a very important role during the drying process. Drying rates of different needle spacing treatments are significantly higher than that of the control, and the drying rate decreases with the increase of needle spacing. Needle spacing has a great influence on the speed of ionic wind, rehydration rate, and polysaccharide contents. The effective moisture diffusion coefficient and the electrical conductivity disintegration index decreases with an increase in needle spacing. Ionic wind has a great influence on the effective moisture diffusion coefficient and the electrical conductivity disintegration index of Chinese wolfberry fruits. The microstructure of Chinese wolfberry fruits dried in an EHD system significantly changed. This study provides a theoretical basis and practical guidance for understanding characteristic parameters and mechanisms of EHD drying technology.

Numerical Simulation of the Flow and Heat Transfer Induced by Corona Discharge Coupling with Electrostatically Forced Vibration

2021 ◽  
Author(s):  
Yeng-Yung Tsui ◽  
Hao-Yu Lin ◽  
Ting-Kai Wei ◽  
Yu-Jie Huang ◽  
Chi-Chuan Wang
Keyword(s):  
Heat Transfer ◽  
Corona Discharge ◽  
Electrostatic Force ◽  
Three Dimensional ◽  
Resonant Mode ◽  
Finite Volume Methods ◽  
Flexible Plate ◽  
Ionic Wind ◽  
Plate Electrode ◽  
Oscillatory Movement

Abstract A thin, flexible plate electrode was adopted to generate both ionic wind and vibration in our previous study. The design contains a metal inductor placed next to the plate electrode so that it is attracted to vibrate by the induced electrostatic force. The resulting flow was used to enhance heat transfer. In this study, a numerical methodology is developed to unveil the flow structure induced by the corona discharge and electrode vibration. The oscillatory movement of the electrode is modeled as a cantilever beam vibrating at its first resonant mode. The electric and flow fields are solved by the finite volume methods. It is shown that a jet-like flow is generated by the electric discharge. The oscillatory movement of the jet results in flat temperature profile in comparison with the corona only system. Owing to the unsteady characteristic, the jet strength is less strong than that without vibration. The calculated results are qualitatively in line with the experiments, though some considerable differences exist. It is found that the oscillatory flow brings about lower overall heat transfer effectiveness than that without vibration regardless of the corona voltage. On the contrary, experiments showed that heat transfer is enhanced at low corona voltages where the ionic wind is not so overwhelming. The disagreement is mainly attributed to the 2-D assumption made in the simulation. The experimental arrangement, the corona discharge, and the vortex flows resulted all are three-dimensional. Therefore, 3-D calculations become necessary.

Plasma Grafit Polymerized Styrene as an Electron-beam Resist

1998 ◽  
Vol 544 ◽  
Author(s):  
Shinzo Morita ◽  
Shinji Ogawa ◽  
Mikinori Suzuki ◽  
Md. Abul Kashem
Keyword(s):  
Electron Beam ◽  
Plasma Polymerization ◽  
Quartz Crystal ◽  
Low Frequency ◽  
Electrode System ◽  
Pulsed Plasma ◽  
Pulse Modulation ◽  
Plate Electrode ◽  
Initial Stage ◽  
Pulsed Plasma Polymerization

AbstractPlasma graft polymerized styrene was formed by a reactor with a parallel plate electrode system on a pulsed plasma polymerized styrene film in a monomer vapor, where the pulsed plasma polymerization was performed by a low frequency 100%pulse modulation of 13.56 MHz power source in styrene vapor. The pulse duration was varied in the range of 0.01∼1 sec and ON time/duty cycle ratio was 1/10 and 1/20. The processes were monitored by a quartz crystal microbalance. The initial stage of plasma polymerization and grafting are discussed in this paper. Also sub 100 nm lines and spaces pattern on the resist delineated by an electron-beam pattering machine was developed by hexane.

Characteristics of laser-induced streamer corona discharge in a needle-to-plate electrode system

2002 ◽  
Vol 55 (3-4) ◽  
pp. 343-350 ◽  
Author(s):  
Seiji Kanazawa ◽  
Takeshi Ito ◽  
Yasuyuki Shuto ◽  
Toshikazu Ohkubo ◽  
Yukiharu Nomoto ◽  
...  
Keyword(s):  
Corona Discharge ◽  
Electrode System ◽  
Plate Electrode ◽  
Streamer Corona
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