Nuclear Energy Conversion

Study on utilization of the limited energy resources to meet the environmental safety from the thermo-fluid point of view.

In order to achieve the economic, environment and safety energy system in the future, we are studying on the science and engineering of utilizing nuclear energies based on the fundamental understandings of physics of energy production and conversion. We focus on the thermal and fluid engineering regarding to effective and safe utilization of energy: especially, the establishment of multiphase flow science and engineering.

Academic Staff


Takehiko YOKOMINEProfessor (Graduate School of Engineering)

Research Theme

Thermo-hydraulic related to Nuclear Fission/Fusion Reactor, MHD turbulence, Multiphase flow engineering, Erosion, Renewable Energy System

Contact Information

Katsura Campus C-cluster, C3-d2S04
TEL: +81-75-383-3922
FAX: +81-75-383-3922
E-mail: yokomine@* (Add "" after @)

Zensaku KAWARA

Junior Associate Professor (Graduate School of Engineering)

Research Theme

Heat transfer and multiphase flow in various systems especially energy conversion system such as nuclear plant, desalination plant, Visualization of flow and thermal phenomena with various methods


Nuclear Energy Conversion, Energy Conversion

Contact Information

Katsura campus C-cluster C3d-Building d2S02
TEL: +81-75-383-3923
FAX: +81-75-383-3923
E-mail: kawara@* (Add "" after @)

Research Topics

Direct numerical simulation study on multiphase flows

Development of numerical simulation procedure to solve various multiphase flow problems and boiling phenomena in pipes and enclosures (see Fig.1). Research on air-sea interaction due to wind driven turbulent shear flow concerning to the global warming problem: investigation of carbon dioxide absorption into the sea (see Fig.2). 


Figure 1:Direct numerical simulation of sub-cool pool boiling in an enclosure


Figure 2:Direct numerical simulation of air-sea interaction due to wind driven turbulent shear flow

Experimental study on multiphase flows

Study on boiling and convective phenomena of liquid metals under magnetic fields and two-phase flow phenomena in a nuclear rector: two-phase cross-flow through a simulated fuel rod bundle assembly (see Fig.3). Study on fundamental multiphase flow phenomena: formation of ring-typed bubble (see Fig.4).


Figure 3:Gas-liquid two phase flow through tilted rod bundle


Figure 4:Production of a ring-typed bubble

Study on micro-scale two-phase flow phenomena

Fundamental study on micro-bubble flows and interaction with turbulent flows. Application of micro bubble technology to the environmental problems. Investigate surface tension driven two-phase flows in micro-channels for application to the space technologies and so on.


Figure 5:Fundamental study on two-phase flows in a micro-channel: (a) a film flow pattern and (b) a slug flow pattern in a pipe of 50µm.