Ultrasonic Measurement for the Experimental Investigation of Velocity Distribution in Vapor-Liquid Boiling Bubbly Flow


  • Wongsakorn Wongsaroj Department of Instrumentation and Electronics Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand
  • Hideharu Takahashi Laboratory for Zero-Carbon Energy, Tokyo Institute of Technology, Tokyo, Japan
  • Natee Thong-Un Department of Instrumentation and Electronics Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand
  • Hiroshige Kikura Laboratory for Zero-Carbon Energy, Tokyo Institute of Technology, Tokyo, Japan




ultrasonic, velocity, boiling, vapor, bubbly


This study proposes an ultrasonic velocity profiler (UVP) with a single ultrasonic gas-liquid two-phase separation (SUTS) technique to measure the velocity distribution of vapor-liquid boiling bubbly flow. The proposed technique is capable of measuring the velocity of the vapor bubble and liquid separately in boiling conditions. To confirm the viability of the measurement technique, the experiment is conducted on vertical pipe flow apparatus. The ultrasonic transmission and effect of ultrasonic refraction through the pipe wall and water are investigated at ambient temperature until subcooled boiling temperature is reached. The velocity profile in the water at elevated temperature is measured to verify the ability of the technique in this application. The bubbly flow velocity distribution measurement in boiling conditions is then demonstrated. The results show that the proposed technique can effectively investigate the velocity of both phases under various fluid conditions in boiling bubbly flow.


G. E. Thorncroft, J. F. Klausner, and R. Mei, “An Experimental Investigation of Bubble Growth and Detachment in Vertical Upflow and Downflow Boiling,” International Journal of Heat and Mass Transfer, vol. 41, no. 23, pp. 3857-3871, December 1998.

G. E. Thorncroft and J. F. Klausner, “The Influence of Vapor Bubble Sliding on Forced Convection Boiling Heat Transfer,” Journal of Heat Transfer, vol. 121, no. 23, pp. 73-79, February 1999.

M. Ishii, Thermo-Fluid Dynamic Theory and Two-Phase Flow, Paris: Eyerolles, 1975.

G. Kocamustafaogullari and M. Ishii, “Foundation of the Interfacial Area Transport Equation and Its Closure Relations,” International Journal of Heat Mass Transfer, vol. 38, no. 3, pp. 481-493, February 1995.

J. Yoo, C. E. Estrada-Perez, and Y. A. Hassan, “Experimental Study on Bubble Dynamics and Wall Heat Transfer Arising from a Single Nucleation Site at Subcooled Flow Boiling Conditions—Part 2: Data Analysis on Sliding Bubble Characteristics and Associated Wall Heat Transfer,” International Journal of Multiphase Flow, vol. 84, pp. 292-314, September 2016.

H. Anglart, “Modelling of the Multidimensional Phase Distribution in a BWR Fuel Assembly,” Technical Meeting on Use of Computational Fluid Dynamics Codes for Safety Analysis of Reactor Systems, Including Containment, pp. 413-424, November 2002.

J. L. Muñoz-Cobo, S. Chiva, S. Méndez, G. Monrós, A. Escrivá, and J. L. Cuadros, “Development of Conductivity Sensors for Multi-Phase Flow Local Measurements at the Polytechnic University of Valencia (UPV) and University Jaume I of Castellon (UJI),” Sensors, vol. 17, no. 5, 1077, May 2017.

R. Lindken and W. Merzkirch, “Velocity Measurements of Liquid and Gaseous Phase for a System of Bubbles Rising in Water,” Experiments in Fluids, vol. 29, no. 1, pp. 194-201, December 2000.

A. Seeger, K. Affeld, L. Goubergrits, U. Kertzscher, and E. Wellnhofer, “X-Ray Based Assessment of the Three-Dimensional Velocity of the Liquid Phase in a Bubble Column,” Experiments in Fluids, vol. 32, no. 2, pp. 193-201, August 2001.

Y. Takeda, “Velocity Profile Measurement by Ultrasonic Doppler Shift Method,” International Journal of Heat and Fluid Flow, vol. 7, no. 4, pp. 313-318, December 1986.

Y. Takeda, “Development of an Ultrasound Velocity Profile Monitor,” Nuclear Engineering and Design, vol. 126, no. 2 pp. 277-284, April 1991.

K. Kikuchi, Y. Takeda, H. Obayashi, M. Tezuka, and H. Sato, “Measurement of LBE Flow Velocity Profile by UDVP,” Journal of Nuclear Materials, vol. 356, no. 1-3, pp. 273-279, September 2006.

H. Kikura, Y. Takeda, and F. Durst, “Velocity Profile Measurement of the Taylor Vortex Flow of a Magnetic Fluid Using the Ultrasonic Doppler Method,” Experiments in Fluids, vol. 26, no. 3, pp. 208-214, February 1999.

S. Eckert and G. Gerbeth, “Velocity Measurements in Liquid Sodium by Means of Ultrasound Doppler Velocimetry,” Experiments in Fluids, vol. 32, no. 5, pp. 542-546, May 2002.

T. Moriya, H. Kikura, and H. Takahashi, “Basic Study on Ultrasonic Remote Leakage Position Estimation Method for Underwater Exploration,” 13th International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering, pp. 1-4, June 2021.

J. Hitomi, S. Nomura, Y. Murai, G. De Cesare, Y. Tasaka, Y. Takeda, et al., “Measurement of the Inner Structure of Turbidity Currents by Ultrasound Velocity Profiling,” International Journal of Multiphase Flow, vol. 136, 103540, March 2021.

T. Yoshida, Y. Tasaka, H. J. Park, Y. Murai, H. Teramura, and S. Koseki, “Inner Structure Visualization of Fresh Fruits Utilizing Ultrasonic Velocity Profiler,” Journal of Visualization, vol. 21, no. 2, pp. 253-265, February 2018.

M. Aritomi, S. Zhou, M. Nakajima, Y. Takeda, M. Mori, and Y. Yoshioka, “Measurement System of Bubbly Flow Using Ultrasonic Velocity Profile Monitor and Video Data Processing Unit,” Journal of Nuclear Science and Technology, vol. 33, no. 12, pp. 915-923, 1996.

Y. Suzuki, M. Nakagawa, M. Aritomi, H. Murakawa, H. Kikura, and M. Mori, “Microstructure of the Flow Field Around a Bubble in Counter-Current Bubbly Flow,” Experimental Thermal and Fluid Science, vol. 26, no. 2-4, pp. 221-227, February 2002.

H. Murakawa, H. Kikura, and M. Aritomi, “Application of Ultrasonic Multi-Wave Method for Two-Phase Bubbly and Slug Flows,” Flow Measurement and Instrumentation, vol. 19, no. 3-4, pp. 205-213, June-August 2008.

W. Wongsaroj, A. Hamdani, N. Thong-Un, H. Takahashi, and H. Kikura, “Extended Short-Time Fourier Transform for Ultrasonic Velocity Profiler on Two-Phase Bubbly Flow Using a Single Resonant Frequency,” Applied Sciences, vol. 9, no. 1, 50, January 2019.

Y. Takeda, Ultrasonic Doppler Velocity Profiler for Fluid Flow, New York: Springer, 2012.

J. Krautkrämer and H. Krautkrämer, Ultrasonic Testing of Materials, 4th ed., Berlin: Springer, 1990.

K. Tezuka, S. Wada, M. Mori, H. Kikura, and M. Aritomi, “Analysis of Ultrasound Propagation in a Steel Pipe Using Ultrasonic Pulse Doppler Method,” Thermal Science and Engineering, vol. 16, no. 3, pp. 95-104, April 2008.




How to Cite

W. Wongsaroj, H. Takahashi, N. Thong-Un, and H. Kikura, “Ultrasonic Measurement for the Experimental Investigation of Velocity Distribution in Vapor-Liquid Boiling Bubbly Flow ”, Int. j. eng. technol. innov., vol. 12, no. 1, pp. 16–28, Dec. 2021.