Innovative Energy Research Center

Multiphase Flow Energy Laboratory

  • ProfessorJun Ishimoto

  • Assistant ProfessorIppei Oshima

Our laboratory mainly focuses on the research and systematization based on the phenomenologically verified computation for the development of advanced multiphase fluid machinery and the optimization of mechanical design in connection with the frontier energy and environmental problems using the transdisciplinary fluid integration method which closely combined with experimental and computational technique. Especially, the cluster type parallel computing method with feed back processing of segmented measurement data is extensively applied to improve the numerical accuracy in transdisciplinary analysis and to improve the design optimization for new-type multiphase fluid applications.

Development of Integrated Multiscale Multiphase Flow Energy Systems

Our laboratory is focusing on the development of innovative multiphase fluid dynamic methods based on the multiscale integration of massively parallel supercomputing and advanced measurements, and research related to creation of environmentally conscious energy systems. Furthermore, we promote basic research for the creation of risk management science and associated new multiphase flow system directly linked to sustainable energy represented by a high-density hydrogen storage technology. Particularly, we are focusing on different field integration research and development such as creation of environmentally conscious type nano-cleaning technology using reactive multiphase fluid that is a thoroughly chemical-free, pure water free, dry type semiconductor wafer cleaning system using cryogenic micro-nano-solid high-speed spray flow, and also focusing on removal-reusing technology for solar cells and ITO membranes for conducting organic polymer (including indium oxide tin). We also performed computational study of multiple bubbles behavior in megasonic field to clarify the mechanism of particle removal by megasonic cleaning. Furthermore, aiming to contribute disaster risk science field, fundamental mitigation effect of mega-floating structures on the water level and hydrodynamic force caused by the offshore tsunami has been computationally investigated using SPH method taking into account the fluid-structure interaction (FSI).
  • Coupled FSI computing of hydrogen leakage phenomenon accompany with crack propagation of pressure vessel
  • Nano device cleaning using cryogenic fine solid particulate spray

Multiphase fluid dynamic approach for natural disaster damage mitigation due to tsunami or flooding

This study can help to optimize the strength of seashore buildings and structures against future tsunami threats, and also can help to estimate structural damage that can be caused by large-scale natural disasters like hurricanes, storms and tornados, and help to develop effective mitigation tools and systems.
  • GPU supercomputing of Flotsam-mixed tsunami impinging to land structure
  • Supercomputing of hydrodynamic behavior of supercritical floodwater impingement to bridge girder

Numerical analysis of contamination removal using megasonic cavitation bubble

  • Chained collapse behavior of multiple linear parallel bubbles near the wall surface under a megasonic field