Welcome to Tomio Okawa's Homepage (Japanese/English)

Last update August 27, 2004

Keywords: thermal-hydraulics, flow boiling, gas-liquid two-phase flow, experiments, numerical analysis

(a)   (b1)  (b2)

Sample videos of thermal hydraulic phenomena we are studying

(a) Impact of drops on liquid film; (b) Vapor bubbles in subcooled flow boiling

　Education

• B.S. Department of Applied Physics, Faculty of Science, Tokyo Institute of Technology (1988)

• M.S. Department of Nuclear Engineering, Faculty of Engineering, Tokyo Institute of Technology (1990)

• Ph.D. Tokyo Institute of Technology (1995)

　Experience

• Researcher at Central Research Institute of Electric Power Industry (1990-1999)

• Lecturer at Osaka University (1999-2002)

• Associate Professor at Osaka University (2002-)

　Research Interests

• Deposition and entrainment of droplets in annular flow

• Thermal hydraulic structure in subcooled flow boiling

• Flow structure in complex geometries

• Predicting the liquid film dryout in flow boiling

• Multidimensional and statistical nature of gas-liquid two-phase flow

• Lagrangian simulation of bubbly flow

　Recent Publications

• Tomio Okawa, Akio Kotani, Isao Kataoka, Experiments for liquid phase mass transfer rate in annular regime for a small vertical tube, International Journal of Heat and Mass Transfer, Vol. 48, pp. 585-598 (2005). Science Direct

• Tomio Okawa, Tatsuhiro Ishida, Isao Kataoka, Michitsugu Mori, An experimental study on bubble rise path after the departure from a nucleation site in vertical upflow boiling, Experimental Thermal and Fluid Science, Vol. 29, pp. 287-294 (2005). Science Direct

• Tomio Okawa, Akio Kotani, Naoya Shimada, Isao Kataoka, Effects of a flow obstacle on the deposition rate of droplets in annular two-phase flow, Journal of Nuclear Science and Technology, Vol. 41, No. 871-879 (2004). AESJ

• Tomio Okawa, Akio Kotani, Isao Kataoka, Masanori Naito, Prediction of the critical heat flux in annular regime in various vertical channels, Nuclear Engineering and Design, Vol. 229, Issue 2-3, pp. 223-236 (2004). Science Direct

• Tomio Okawa, Tomoe Tanaka, Isao Kataoka, Michitsugu Mori, Temperature effect on single bubble rise characteristics in stagnant distilled water, International Journal of Heat and Mass Transfer, Vol. 46, Issue 5, pp. 903-913 (2003). Science Direct

• Tomio Okawa, Akio Kotani, Isao Kataoka, Masanori Naito, Prediction of critical heat flux in annular flow using a film flow model, Journal of Nuclear Science and Technology, Vol. 40, No. 6, pp. 388-396 (2003). AESJ

• Tomio Okawa, Isao Kataoka, Michitsugu Mori, Numerical simulation of lateral distribution in turbulent upward bubbly two-phase flows, Nuclear Engineering and Design, Vol. 213, Issues 2-3, pp. 183-197 (2002). Science Direct

• Tomio Okawa, Tsuyoshi Kitahara, Kenji Yoshida, Tadayoshi Matsumoto, Isao Kataoka, New entrainment rate correlation in annular two-phase flow applicable to wide range of flow condition, International Journal of Heat and Mass Transfer, Vol. 45, pp. 87-98 (2002). Science Direct

• Extended Publication Listing (Written in English and Japanese)

　Awards

• 1995, Best Paper Award, The Japanese Society for Multiphase Flow (Tomio Okawa, Akio Tomiyama, 1995. Applicability of high-order upwind difference methods to the two-fluid model, Advances in Multiphase Flow, Elsevier, 227-240)

• 1995, Best Presentation Award, Power and Energy System Division, The Japan Society of Mechanical Engineers (Champagne effect in compressed air energy storage system)

　Links in Osaka University

• Osaka University

• School/Graduate School of Engineering

• Mechanical, Materials and Manufacturing Science Division

• Department of Mechanophysics Engineering

• Fluid Engineering and Thermo Hydraulics Area