2014 Annual Meeting of The Institute of Electrostatics Japan
Hiroshima International University
September 7-8, 2014

8pA-1
September 8th (Mon.), <15:00-16:45>
Room 1

Current waveform and electric charge in electrostatic
sprayingKazumasa CHIKU and Hirofumi SHIMOKAWA
Kanagawa Institute of Technology

Abstract:
In this study, current waveform detected in the electrostatic atomizationby the nozzle was made to synchronize with the image of high-speed camera.
The change of the process of the electrostatic atomization phenomenon isobserved from the synchronization, and the electrification process is revealed.
The electric charge required from pulse current form in dependent on the valueof applied voltage and the polarity. The electric charge decreased with thevoltage in tap water, and it increased with the voltage in the pure water. It’s
considered that the electric charge got from current waveform does not agreewith electric charge of the droplet.

2014 Annual Meeting of The Institute of Electrostatics Japan
Hiroshima International University
September 7-8, 2014

8pA-2
September 8th (Mon.), <15:00-16:45>
Room 1

Behavior of a Viscous Water Droplet on aSuper-Hydrophobic Plate under Three-Dimensional ElectricField○Takaki Ohuchi，Yoshio Higashiyama*Graduated School of Science and Engineering, Yamagata University

Abstract:
Electrostatic non-contact mixing of a water droplet placed on a superhydrophobic plate was investigated using a resonant vibration under an AC fieldwith a definite frequency. Three-dimensional electric field was employed toenhance liquid flow inside a water droplet and to stir or mix water droplets byirregular vibration as well as resonant vibration. Sinusoidal waves withresonant frequency of 10Hz were applied to a pair of semispherical electrodes
and to a electrode located above a 100mL water droplet placed onsuper-hydrophobic plate coated with HIREC. The deformation rate of a viscous
water droplet with a viscosity from 0.9 to 29 mPa･s was measured from theimages taken by a high-speed video camera. Under the three-dimensional AC
electric field, a water droplet was largely deformed during resonant vibration,
especially in the vertical direction due to the presence of vertical field. The
deformation rate in the vertical direction of a distilled water droplet with aviscosity of 0.9 mPa･s was 1.8, while a viscous water droplet with 29 mPa･s was
1.3. The mixing performance of a viscous droplet should be confirmed by thissystem.

2014 Annual Meeting of The Institute of Electrostatics JapanHiroshima International University
September 7-8, 2014

8pA-3
September 8th (Mon.), <15:00-16:45>
Room 1

Electrification and division of the electrified water droplet on
the super hydrophobic surface○Yusuke FUTAMI and Hirofumi SHIMOKAWA
Kanagawa Institute of Technology

Abstract:
In the previous report, in which dropped on the hydrophobic surface ofthe silica type, the droplet was charged negatively, and small ejected droplet wascharged positively. In addition, the hydrophobic surface was charged positively.
In this report, charging droplet was dropped on the hydrophobic surface of thesilica type. As the result, the surface was charged positively and small ejected
droplet was charged positive. But, when the water droplet with greatly negatively
charge was dropped, small ejected droplet was charged negatively.

2014 Annual Meeting of The Institute of Electrostatics Japan
Hiroshima International University
September 7-8, 2014

8pA-4
September 8th (Mon.), <15:00-16:45>
Room 1The discharge characteristics by RF burst plasma usingplasma-based ion implantation○Nobuyuki FUJIMURA, Hiromitsu NOGUCHI, Kazuhiro SHIMONO, Hiroshi
TOYOTA and Takeshi TANAKA
Hiroshima Institute of Technology

Abstract:
Plasma-based ion implantation (PBII) is a technique used to modify thesurface of samples by immersion in plasma and application of a negative bias
voltage to the target. In the PBII method, an ion and a radical are produced byapplying a negative pulse voltage to an item and the reaction by it inactivatesbacteria spore. Method of generating plasma using PBII has only self-ignited
plasma or combination of self-ignited plasma and RF burst plasma. In this study,
the authors examined the plasma generation method of RF burst plasma. Theresults, RF burst power required for the plasma generation becomes lower as
the pressure increases.

2014 Annual Meeting of The Institute of Electrostatics Japan
Hiroshima International University
September 7-8, 2014

8pA-5
September 8th (Mon.), <15:00-16:45>
Room 1

Vibrational energy relaxation in atmospheric pressure
streamer discharge
Department of Electrical Engineering, Tohoku University
Department of Electrical Engineering, Tohoku University

Abstract:Behavior of vibrationally excited molecules in atmospheric pressure
streamer discharge is discussed. Streamer discharge is simulated with ourpreviously developed axis-symmetric 2D model and production and decay
processes of vibrationally excited molecules of nitrogen, oxygen, and watermolecules
arecalculated
byvibration-to-translation(V-T)
andvibration-to-vibration(V-V) reactions. Over the 70% of discharge energy goes tovibrational energy mode of nitrogen and the energy does not reach equilibrium
until 100us in humid air.
This may affect the kinetics of high repetition rate discharge.

2014 Annual Meeting of The Institute of Electrostatics Japan
Hiroshima International University
September 7-8, 2014

8pA-6
September 8th (Mon.), <15:00-16:45>
Room 1The Motion of the Electron in Atom
○Seishu SHIMAMOTO and Yoshio TAKEMOTO

Department of Mechanical and Electrical Engineering, Nippon Bunri University

Abstract:
We derive the electron's equation of motion in atom from the modified
Maxwell equation. Furthermore, we work towards improvements for the Bohratomic model by using of this equation of motion. The relativistic energy in theorbit of the electron in atom is numerically calculated. The calculation resultshows that the similarity between the Planck constant and the angular moment.
These results strongly suggest the existence of the relation between thesurrounding frequency energy, surrounding frequency and the angular moment.