2021 Fiscal Year Final Research Report
Hydrodynamic modeling of wettability change considering electrodynamics
| Project/Area Number |
19K04178
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 19010:Fluid engineering-related
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| Research Institution | Kansai University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 電気流体力学 / 表面張力 / 微小スケール / 濡れ性 |
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| Outline of Final Research Achievements |
For the purpose of developing a simulation method for electrowetting (EW), in which the wettability of a solid surface changes by applying voltage, the followings were performed.
1. In the existing simulators, there are irresponsible or unreproducible treatments for the wettability, so we have developed and improved a model to deal with a wide range of wetting phenomena. 2. Taking EW as a phenomenon of electrohydrodynamics, we developed a new method to solve the equation of electrical dynamics and calculate the force acting on the liquid.
As a result, a simulator that can be applied in a wide range was created, and it was shown that there is a possibility that the tendency seen in the experiment at low voltage and high voltage can be reproduced for the relationship between voltage and wettability.
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| Free Research Field |
流体工学
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| Academic Significance and Societal Importance of the Research Achievements |
電圧と濡れやすさの変化がどのような関係にあるかは，部分的には実験に合う理論式があるが，電圧が大きい条件などでは成立せず，その部分の物理もよく分かっていない．本研究では，EW現象を静電力学の問題ととらえたシミュレーションで再現できるかを試みた．
本当に濡れ性が変化しているのではなく，静電気力でそのように見えるだけという1つの見解につながる結果が得られた．この結果と開発されたシミュレーターは，マイクロTAS（微小総合分析装置）やEWディスプレイ等の新技術の開発・設計・運用に大変有用となる．
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