高時間分解能PTVを用いた非一様ゼータ電位場における電気浸透流の三次元過渡流動構造(流体計測・実験(1),一般講演)

概要

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The present study experimentally investigated the transient structure of electroosmotic flow with nonuniform wall zeta-potential. An iterative velocity measurement technique using particle tracking velocimetry was proposed to achieve the time-resolved measurements with a high spatial resolution. The near-wall and bulk flow velocities were measured by an optical system with the evanescent wave and volume illumination. The experiments were conducted using microchannels with nonuniform wall zeta-potential by the material heterogeneity and the surface modification on the wall. It is concluded that electroosmotic flows have different velocity profiles by the zeta-potential distribution, but the volumetric flow rate and the average zeta-potential in the microchannel shows a proportional relationship.
2008-09-04