Plenary and Semi-Plenary Lectures
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| Title: |
| Multiscale Modeling and Simulation of Phase Interface and Its Application |
| Lecturer: |
| Yoichiro Matsumoto |
| Abstract: |
| The microscopic interfacial features between phases have significant influences on the macroscopic behavior of multiphase flows, biomedical membrane and so on. We investigated the microscopic structure of the gas-liquid interface by Molecular Dynamics method. The effect of impurities such as surfactants or electrolytes in the aqueous solution on the molecular scale structure and the macroscopic interfacial properties are presented. A simple planar interface system and a bubble system in a nanometer-size void region were simulated by MD method. In these systems, some static and dynamic properties of molecules near the interface were investigated and some microscopic and macroscopic features of the interface were elucidated. We also show the difference of the dynamics of water molecules between the surfactant and electrolyte solutions. We also considered the definition of the interface at the molecular level which can treat the local and instantaneous structure, and discussed the physical properties which we calculated including the effect of molecular fluctuations of the interface. The macroscopic properties such as diffusivity of impurities along the interface were validated by comparing with the experimental macroscopic feature of the interface and the micro bubble rising behavior in contaminated water. The experimental results agreed well with the numerical one. |
 Dr. Yoichiro Matsumoto is a professor of Mechanical Engineering at the University of Tokyo. He graduated from the University of Tokyo and received B. Eng. in 1972 and Dr. Eng. in 1977. Since then he was working as a faculty member of the Department of Mechanical Engineering at the University of Tokyo. He has made numerous and lasting contributions to engineering research in various fields such as bubble dynamics, cavitation, multiphase flows, molecular dynamics simulation, rarefied gas dynamics, medical applications of fluids engineering, and other topics. His research interests are in modeling and simulation in various engineering science fields. He received many awards from various scientific societies and organizations. He has held positions of great responsibility in the Japan Society of Mechanical Engineers, the Japan Society of Fluid Mechanics and so on. He has been instrumental in the organization of major international conferences. |
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