振動液柱法における高電圧印加による表面張力低下現象

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  • Surface Tension Reduction under High Potential by Vibrating Jet Method

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The reduction of liquid surface tension under high potential was investigated. The surface tension was measured by means of the vibrating jet method, which is a characteristic method of measuring dynamic surface tension without touching. Distilled water, ethanol, methanol and benzene were used as sample materials. Except in the case of benzene, the liquid surface tensions were reduced when high potential was applied. The reduction of surface tension was proportional to the square of applied potential. It was observed that the surface tension fell with elapsed time (i. e. dynamic surface tension) when applied potential was raised. On the other hand, no effect was observed for benzene. The reduction of surface tension was calculated theoretically based on the two-dimensional model. The agreement between calculated values and observed data was fairly good, though the calculated values were slightly larger than observed values.

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