Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Visualization Study on Kinematics of Bubble Motion in a Water Filled Cylindrical Tank

원형 탱크 내부의 기포운동에 대한 가시화 연구

  • 김상문 (부산대학교 대학원 기계공학부) ;
  • 정원택 (부산대학교 대학원 기계공학부) ;
  • 김경천 (부산대학교 기계공학부)
  • Received : 2010.08.27
  • Accepted : 2010.09.18
  • Published : 2010.09.30
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Abstract

A visualization study to evaluate bubble motion in a tab water filled cylindrical tank with a varying flow rate of compressed air is conducted. The flow rate of compressed air varies from 1 to 5 L/min. Time resolved images are acquired by a high speed camera in 10 bit gray level at 100 fps and the measurement volume is irradiated by a 230 W halogen lamp. It is observed that there are three different regions; the bubble formation region, the rising bubble region and the free surface region. During the rise of bubble, the shape is changed as if an elastic body. Based on the binarized bubble image, the mean diameters of rising bubbles are estimated at beneath of the free surface. As the gas flow rate increases, the mean diameter is increased and the rising velocity also increases with buoyancy force.

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References

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