2017 Fiscal Year Final Research Report
Visualization of spatial structure of bubble in two-phase flow through porous media
| Project/Area Number |
15K13892
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Thermal engineering
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| Research Institution | Fukuoka Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 多孔質 / 気液二相流 / 可視化 |
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| Outline of Final Research Achievements |
As the halation at the gas-liquid interface brings about technical difficulties for the visualization of two phase flow using laser light sheet, only few attempts have ever been made at the experimental examination of the spatial structure of the bubble. In this study, we propose an optical observation method using differences of wavelength between the gas phase and the Rhodamine B dye in the liquid phase which produces fluorescence upon exposure to the green laser sheet. The camera equipped with a sharp cut-off filter is used for fluorescence detection, so that only the fluorescent light is recorded. In other words, the image which corresponds to the bubble is omitted. Furthermore, we examine the Reynolds transport theorem in the microscopic and macroscopic fields, and modify the conventional theorem for the local volume average of a gradient which modelling of the flow through porous media and the two phase flow is based on.
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| Free Research Field |
伝熱工学
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