Quantitative Analyses of Electrohydrodynamically Induced Phenomena in Gas-Liquid Two-Phase Fluid

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In this work, quantitative analyses of electrohydrodynamically induced gas-liquid two-phase fluid flow phenomena have been conducted. The fluid flow velocity was obtained from a particle image velocimetry using a phosphorescence trace. In order to realize the analysis method for the gas-liquid two-phase electrohydrodynamic phenomenon, some non-dimensional parameters derived from the experimental results with fluid flow velocity were evaluated in detail. For requirements of progressive investigation in multi-phase fluid flow understanding, this work presented as following research results.1. Development of a molecular tagging velocimetry for the gas-liquid two-phase flow measurements.An application of molecular tagging procedure to the particle image velocimetry was conducted to prevent the disturbances due to the charged tracer particles. The molecular tagging procedure was developed from an image capture device with a time-resolution rate of 10 nanosecond and a biacetyl molecular tracer with visible phosphorescence time continuing a few millisecond order. It was enabled us to measure the electrohydrodynamically induced gas-liquid two-phase flow velocity.2. Analyses of conductive and dielectric forces in gas-liquid electrohydrodynamicsFrom the above experimental results, conductive and dielectric forces were analyzed in order to find out the non-dimensional parameters of the presented gas-liquid electrohydrodynamics. It was enabled us to quantitatively analyze the electrohydrodynamically induced multi-phase flow phenomena.3. Application of this phenomena to liquid pumpA new type of non-intrusive two-phase electrohydrodynamic pump was investigated. The pumping performance was experimentally and analytically evaluated by the fluid flow measurements and the non-dimensional parameters. An electrohydrodynamical effect on the pumping performance was quantitatively characterized.