| Project/Area Number |
05650327
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
電子デバイス・機器工学
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| Research Institution | YAMANASHI UNIVERSITY |
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Principal Investigator |
KIYOHIRO Noriaki YAMANASHI UNIVERSITY,FACULTY OF ENGINEERING,ASSOCIATE PROFESSOR, 工学部, 助教授 (00016586)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1994: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1993: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Electro-Rheological Fluid / Ink jet / Drop On Demand / Effective length / AC Electric Field / Shear Stress / Shear Rate / Newtonian Mechanics |
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| Research Abstract |
ERF has a dielectric oily liquid base in which fine solid particles are suspended with small amount of surface active agents to prevent gravitational settling. A jet of this ERF is produced by forcing ink under high pressure if no electric field is applied across the fluid. When the electric field is applied, the ERF ink is not ejected from the nozzle because of its increased viscosity. Therfore, droplet generation of this ink can be controlled electrically. Furthermore, high printing quality and UV light fitness are expected to this type pf DOD inkjet system, since the composition of ERF is very similar to that of printing ink.
We showed experimentally that droplets generation was controlled by an AC electric field and droplet generation rate is about 100 dps. Then, the droplet volume ejected from the nozzle is calculated using Newtonian mechanics and the equivalent length of a particular parallel ink channel that gives the same viscous resistance to fluid flow as dose the tapered or narrow width part. The calculated droplet volume ejected from the nozzle agrees well with that of experimentally observed results.
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