Browse > Article
http://dx.doi.org/10.5407/JKSV.2012.10.2.014

Measurement of Bubble Diameter and Rising Velocity in a Cylindrical Tank using an Optical Fiber Probe and a High Speed Visualization Technique  

Kim, Gyurak (부산대학교 대학원 기계공학과)
Choi, Seong Whan (부산대학교 대학원 기계공학과)
Kim, Yoon Kee (부산대학교 대학원 기계공학과)
Kim, Kyung Chun (부산대학교 대학원 기계공학과)
Publication Information
Journal of the Korean Society of Visualization / v.10, no.2, 2012 , pp. 14-19 More about this Journal
Abstract
An optical fiber probe system for measuring the local void fraction in the air-water two-phase flow was developed with a 1550 nm light source. Air was injected through a nozzle placed in the center of the bottom wall of a water-filled cylindrical tank. The optical fiber probe having a diameter of $125{\mu}m$ was sufficiently thin to resolve the air-water interface of the bubbly flows. To verify the performance of the optical fiber probe, the synchronized high speed visualization study using a high speed camera was carried out. Comparison between the optical signals and the instantaneous bubble diffraction images confirms that the optical fiber probe is very accurate to measure the void fraction in two-phase flows. The estimated bubble diameter and the rising velocity by the optical fiber probe have 1% and 5% of accuracy, respectively.
Keywords
optical fiber probe; void fraction; two-phase flow; high speed visualization;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Zenit, R., Koch, D. L. and Sangani, A. S., 2001, "Measurements of the Average Properties of a Suspension of Bubbles Rising in a Vertical Channel", J. Fluid Mech., Vol.429, pp.307-342.   DOI   ScienceOn
2 Murakawa, H., Kikura, H. and Aritomi, M., 2003, "Measurement of Liquid Turbulent Structure in Bubbly Flow at Low Void Fraction Using Ultrasonic Doppler Method", J. Nucl. Sci. Technol., Vol.40, No.9, pp.644-654.   DOI
3 Matsubayashi, M. and Tsuruno, A., 1992, Neutron Radiography, Gordon and Breach Science Publishers, San Francisco, Vol.4, pp.415-422.
4 Julia, J. E., Harteveld, W. K., Mudde, R. F., Akker, E. A., 2005, "On the accuracy of the void fraction measurements using optical probes in bubbly flows", Rev. Sci. Instrum., Vol.76, 035103.   DOI   ScienceOn
5 Rojas, G. and Loewen, M. R., 2007, "Fiber-optic probe measurements of void fraction and bubble size distributions beneath breaking waves", Exp. Fluids, Vol.43, pp.895-906.   DOI
6 Serdula, C. D. and Loewen, M. R., 1998, "Experiments investigating the use of fiber-optic probes for measuring bubble-size distributions", IEEE J. Oceanic Eng., Vol.23, No.4, pp.385-399.   DOI   ScienceOn
7 Xue, J., Al-Dahhan, M, Dudukovic, M. P. and Mudde, R. F., 2003, "Bubble dynamics measurements using four-point optical probe", The Canadian Journal of Chemical Engineering, Vol.81, pp.375-381.
8 Saito, T., Matsuda, K., Ozawa, Y., Oishi, S. and Aoshima, S., 2009, "Measurement of tiny droplets using a newly developed optical fibre probe micro-fabricated by a femtosecond pulse laser", Meas. Sci. Technol., Vol.20, 114002.   DOI   ScienceOn
9 Kim, J. S., Kim, S. M., Kim, H. D., Ji, H. S. and Kim, K. C., 2011, "Dynamic structures of bubble-driven liquid flows in a cylindrical tank", Exp. Fluids., DOI 10.1007/s00348-011-1224-x.   DOI