141 単一光ファイバープローブによる微小気泡計測(S34-4 複雑流体の流れとその応用(4),S34 複雑流体の流れとその応用)  [in Japanese] 141 Measurement of micro-bubble properties via Single-Tip Optical-fiber Probe  [in Japanese]

In order to solve global warming it is essential to realize highly efficient systems such as chemical plants or power plants including multiphase systems. In these systems, probe methods are useful for real-time and high accuracy measurements. In this study, the authors measured bubbles properties via Single-Tip Optical-fiber Probe (S-TOP). The gradient of signals obtained from the S-TOP is proportional to the interfacial velocity. We applied this relationship to bubble measurement. As a result, it is showed that the measurement for ellipsoidal shape bubble has high accuracy; the errors were less than 2%.