レ-ザ計測法による垂直管内気泡流の研究-3-気泡速度と液速度の同時測定 [in Japanese] Study on Vertical Bubbly Flow Using Laser Doppler Measurement : 3rd Report, Simultaneous Measurement of Bubble and Liquid Velocities [in Japanese]
Search this Article
Simultaneous measurement of local velocities of both phase bubbly flow have been successfully made using a laser Doppler velocimeter (LDV). First, an exact theory which forms the basis of the velocity measurement of a large particle, such as a bubble, has been derived and its validity confirmed by experiments. Second, the present measurement method has been applied to an air-water vertical bubbly flow. As a result, it has become evident that the measured value of a local slip velocity between bubble and liquid is lower than a terminal velocity of a single bubble rising in still water, and that the slip velocity gradually decreases with the increase in the mean liquid velocity.
- Transactions of the Japan Society of Mechanical Engineers. Series B.
Transactions of the Japan Society of Mechanical Engineers. Series B. 51(472), p4194-4200, 1985-12
The Japan Society of Mechanical Engineers