Flow Visualization near the Solid-Liquid Interface

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  • 界面近傍のナノスケール流動の可視化
  • カイメン キンボウ ノ ナノスケール リュウドウ ノ カシカ

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Abstract

  A total internal reflection fluorescence microscope is employed for observing the flow behavior of distilled water near the wall surface; this paper describes the observation methods and measurement results. In addition to the description of the evanescent wave illumination, the paper presents the features of this measurement method, which are obtained using an actual photograph of the particle images. The paper also describes test methods and test results of the relationship between the fluorescence intensity of the particles and the position of the particles. In addition, a method for determining the velocity profile of particle images is presented. The velocity profile near the wall surface is obtained from the integrated value of the particle tracking velocimetry data in the evanescent wave illumination. The obtained results for the velocity profile of distilled water are found to agree well with the two-dimensional Poiseuille velocity profile at 100 nm < z < 250 nm.

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