0225 光線追跡法による光ファイバプローブの数値シミュレーション(OS2-5 乱流の計測・解析・制御,オーガナイズドセッション)

概要

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Ray tracing numerical analysis of optical fiber probing, which is one of practical measurement techniques of bubbles and droplets dynamics, has been developed to improve the measurement accuracy of the probe. The analysis is constructed by bounded surfaces of flat planes, cylinders, and ellipsoids and constant refractive index objects in three dimensions. The rays' energy of reflection and refraction are calculated repeatedly on the surfaces considered with polarization. The rays' source is assumed as linear polarized light with random fluctuations simulating the laser source. The numerical results of the probe bursting flat water surface agreed with the experimental results. In addition, the energy intensity of the returned rays formed a sharpen peak just before the sensing edge bursts a gas-liquid surface. The numerical results well agree with the experimental results. The peak positions, however, disagrees. The surface deformation of the bubbles in the experiment is estimated to cause the difference.
一般社団法人日本機械学会の論文
2009-11-06