Heat Transport

Professor

SAITO, Yasushi e-mail: ysaito<atmark>

Associate Professor

ITO, Kei e-mail: k-ito<atmark>

Assistant Professor

SHEN, Xiu-Zhong e-mail: xzshen<atmark>

ITO, Daisuke e-mail: itod<atmark>

* replace <atmark> with @rri.kyoto-u.ac.jp

This laboratory pursues safe and efficient use of high-density thermal energy produced in various next generation nuclear energy systems, such as an advanced nuclear reactor, fusion reactor and an accelerator-driven system (ADS). The research activity covers basic studies on the characteristics and the control of thermal-ydraulic phenomena under various extreme conditions which are encountered in the next generation nuclear energy systems. In addition, study on the application of neutron radiography to multiphase fluid measurement is being performed taking advantage of KURRI in neutron utilization. On going research subjects are as follows:
  1. Thermal-hydraulics of lead bismuth eutectic (LBE) for ADS development,
  2. Development of high heat flux cooling method using micro-bubble emission boiling (MEB),
  3. Application of Neutron Imaging for thermal-hydraulic study,
  4. Development of innovative fluid measurement method,
  5. Enhancement of boiling heat transfer by radiation induced surface activation (RISA),
  6. Mechanism of subcooled boiling CHF and its modeling,
  7. Thermal-hydraulics of multiphase flow under severe accident conditions of nuclear reactors,
  8. High-precision numerical simulation of multi-phase flow,
  9. Modeling of gas-liquid two-phase flows with highly-intensified vortices,
These researches are performed using mainly the Thermal Hydraulic Test Facility and its accessories, and cobalt-60 gamma ray source for RISA and neutron radiography facilities of KUR, JRR-3 in the Japan Atomic Energy Agency and HANARO in Korean Atomic Energy Research Institute.
Micro-Bubble Emission Boiling 3D-distributions of bubbles measured by Wire Mesh Sensor (WMS)Left: bubbly flow Right: Slug flow
Micro-Bubble Emission Boiling
2D-distributions of velocity and void fraction in a molten LBE two-phase flow measured using neutron imaging.
2D-distributions of velocity and void fraction in a molten LBE two-phase flow measured using neutron imaging. 3D-distributions of bubbles measured by Wire Mesh Sensor (WMS)
Left: bubbly flow, Right: Slug flow
High-precision simulation result of 
dynamic interfacial deformation
High-precision simulation result of 
dynamic interfacial deformation

High-precision simulation result of dynamic interfacial deformation