Fluid Engineering Laboratory

Analyzing data obtained from fusion experiments is an extremely important means for understanding the basic physics of fusion plasma and realizing fusion reactors. Our group conducts joint research in collaboration with various research institutions such as the National Institute for Fusion Science and other universities, and conducts data analysis and considerations. In particular, we analyze experimental data for large experimental equipment such as LHD and JT-60SA.

For deep space exploration, electric propulsion using plasma is considered to be the most promising option, rather than so-called internal combustion engine chemical rockets. It is called a variable specific impulse plasma propulsion machine, and is a system that obtains high thrust by accelerating the generated plasma using a magnetic nozzle. Our laboratory uses MANATEE (MAgnetic Nozzle Acceleration Thruster with Electrode-less Experiments) to research this variable specific impulse plasma propulsion machine using plasma that utilizes microwaves.

Car batteries have the problem that their capacity drops to 70% 10 years after the car was new. In addition, batteries have a narrow optimum temperature range and require sophisticated temperature control, so the cooling system plays an extremely important role. Our group conducts experiments and analyzes mainly on multiphase flows of gas and liquid phases, with the aim of elucidating the flow and heat transfer conditions in battery cooling tubes.

Understanding how air and water flow together in different pipe shapes is crucial for various engineering fields, including industrial processes and nuclear reactors. We focus on the stratified gas-liquid flow regime, particularly relevant in industries such as petroleum and automotive sectors, where it offers benefits like phase separation and process control. Investigating these phenomena in complex geometries is essential, especially in scenarios like automotive engines, where cooling of exhaust gases can lead to liquid accumulation, posing risks to sensors. Through a combination of experimental and numerical approaches, we scrutinize air-water interfaces to validate models accurately. They delve into factors like velocity profiles and vortex formation, enhancing our comprehension of their interaction. Additionally, the study extends to pulsatile airflow conditions, providing insights into dynamic operational scenarios. Our research aims to improve our understanding of two-phase flow dynamics, with implications for diverse industrial and environmental applications.