PTVの応用による気泡流三次元計測
2001 年 21 巻 2Supplement 号 p. 55-58
詳細
2001 年 21 巻 2Supplement 号 p. 55-58
A three-dimensional particle tracking velocimetry has been developed to measure the bubbly flow. The system realizes to obtain not only velocity vectors of the liquid but also velocity vectors and geometries of the bubbles. Fluorescent particles were used as tracers for the liquid phase. Two different light sources were used to illuminate the object. Black lights with adequate band-pass filters were used as the ultra violet light source to illuminate the particles. Incandescent lights with red colored cellophane sheets were used as backlight to take the shadow image of bubbles. A high-speed color video camera was used with six mirrors to take stereo images of the bubbly flow. A digital color image processing was applied to separate the bubbles and the tracing particles in the video images. A natural convection of the bubbly flow in a vertical pipe was measured to demonstrate the capability of the present system.
