Refractivity Matcing of Water and Transparent Solid Particles and its Application to Measurement of Liquid-Solid Two-Phase Flow

通过水中透明物体的光束由于水和材料的折射率的差异而弯曲，这限制了诸如流动可视化技术和激光多普勒测速法的光学水文测量的使用。通过向水中添加溶剂以增加润湿活性和通过寻找或开发低折射和高透射材料可以实现润湿活性。溶剂改变水的物理性质。其中一些在实验后释放到公共水体时会造成污染。材料的折射率取决于温度、光波频率等。本研究项目提出了一系列可能适用于水和透明体之间的折射率匹配的材料，并提供了生产、使用和处理它们的额外信息。

A light beam passing through a transparent body in water bends by difference in refracitivity indices of water and the material, which restrains use of optical hydrometry such as flow visualization techniques and laser Doppler velocimetry. Mctching refractivity can be realized both by adding a solvant to water to increase the refractivity and by searching or developing lower refractive and highly tranparent materials. Solvants change physical properties of water. Some of them are pollutive when released to public water bodies after experiments. Refractive index of a material depends on temperature, light-wave frequency, etc.This research project presented a list of materials potentially applicable to refractivity matching between water and tranparent bodies with additionabal information to produce, use and treat them.