2019 Fiscal Year Research-status Report
A Multi-physics Compressible-Incompressible Computational Framework for Mechanistic Simulation of Steam Explosion in Fuel-Coolant Interaction
| Project/Area Number |
19K15478
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Duan Guangtao 東京大学, 大学院工学系研究科(工学部), 特任助教 (40804852)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | Particle methods / MPS method / SPH method / Vaporization / Multiphase flow / Heat transfer |
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| Outline of Annual Research Achievements |
The following work was mainly conducted to develop a particle method for the gas-liquid flow with vaporization:
(1) The incompressible Moving Particle Semi-implicit (MPS) method and weakly compressible Smoothed Particle Hydrodynamics (SPH) mehtod were coupled to simulate the gas-liquid two-phase flow.
(2) The the vaporization model was developed for the coupled MPS-SPH method.The Stafen/Sucking problems and film boiling are simulated to investigate the capability of the developed method.
A paper has been written and submitted to an international journal. Part of the work was accepted by WCCM-2020.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The project is progressing based on the proposed plan. Even though some technical difficulties were encourted, they have been all resolved by slightly modifing the specific implementation methods. The first-year aim of the project has been realized, paving a good way for the following years. Therefore, I regard the project is progressing rather smoothly.
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| Strategy for Future Research Activity |
The overall aim of the project is to develop a meshfree particle method for fuel-coolant interaction with both vaporization of coolant (first year) and solidification of fuel melt (second year).
In the second year, our previously developed MPS method to simulate multiphase flow, highly viscous flow and solidification phase change will be coupled with the developed method of the first year. The aim is to simulate both solidification and vaporization phase change.
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| Causes of Carryover |
The price of workstation is slightly different from the planned one. The left amount will be used as the miscellaneous fee in next year.
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