• Proceedings of the KSME Conference
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• 2008.11a
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• pp.1851-1856
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• 2008

A numerical program based on computational fluid dynamics has been developed to simulate characteristics of an EHD induction micropump. The ambiguity of boundary conditions was removed by adopting an equation formulated for electric potential as the dependent variable. The calculations show that the dependency of frequency agrees well with the experiments and the previous analysis. The instability, caused by backflows, is getting stronger as the channel depth increases, which is consistent with experiments. The present study reveals that it is due to the limit in the penetration depth which the electric field can affect. Despite the disadvantage of large channel depth, there is a certain optimal depth for the maximum flow rate.

• Proceedings of the KIEE Conference
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• 1993.11a
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• pp.198-200
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• 1993

This paper represents the experimental results of electrohrdrodynamic(EHD) micropump driven by traveling- wave voltage. We fabricated 60 electrodes array with $100{\mu}m$ width and $100{\mu}m$ interval on the pyrex glass. On that glass we fabricated the micro channel which had the cross section of 3mm by 0.5mm. This pump was driven by 6 phase square traveling-wave voltage. We used the corn oil for experiments and increased the temperature of fluid by resistive heater. An optical microscope with CCD camera and monitor was used for observation. The fluid velocity was large for the large driving voltage and the high temperature. This EHD pump had the fluid velocity in specific frequency (near 1Hz) which had relation to the charge relaxation time in that oil.

• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.1069-1071
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• 1993

This paper presents the characteristics of micro induction EHD(Electro Hydro Dynamic) pump in which the fluid has a temperature gradient to the transverse direction of a traveling wave. The effects of the channel depth, the wave length and wave form of the treveling wave has been investigated in micro pump. The effect of temperature gradient also has been investigated. The fluid velocity becomes large as the wave length becomes small and the temperature gradient becomes high. The channel depth has little influence on the fluid velocity. The EHD pump driven by the square wave has the larger fluid velocity than that driven by the sinusoidal wave.