1403 気泡噴流内の気泡と流体の速度分布の計測(OS14-1 分散系混相流のダイナミクス,オーガナイズドセッション)

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This experimental research concerns an air-bubble-jet flow in water. We apply a three-dimensional particle-tracking-velocimetry (3D-PTV) technique to the flow, in order to obtain both air-bubble and ambient-liquid (water) velocities. In bubble-velocity measurements, we regard air bubbles as tracers. And, in liquid-velocity measurements, we regard polyethylene particles suspended in the liquid as tracers. Then, we visualise the three-dimensional motions of air bubbles and ambient liquid. As we record stereo images using two high-speed video cameras, we can get timely-consecutive information of air-bubble and ambient-liquid motions. As a result, we quantitatively reveal the three-dimensional unsteady flow of a simple bubble-jet plume near an air nozzle exit.
2009-11-06