| Budget Amount *help |
¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2013: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
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| Outline of Final Research Achievements |
One of the major concern of carbon dioxide capture and storage is potential risk of leakage due to buoyancy. In this study, we investigated the trapping mechanisms of CO2 based on microtomography. A physical model of initial gas saturation accompanied with the competition among the interfacial tension, viscous shear force, and buoyancy was proposed, because residual gas saturation depends strongly on the initial saturation. The onset time of the natural convection, which governs the shift to dissolution trapping, is strongly impacted by dispersion, which is apparent diffusion due to complex structure of porous media. Mass transport process from the trapped phase to mobile phase was investigated with the direct numerical simulations for pore scale images.
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