| Budget Amount *help |
¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
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| Outline of Final Research Achievements |
We investigated the mechanism enhancing the dispersion and mixing of a slurry, a plastic fluid, in a stirred vessel by aeration based on the data measured for the passage of the bubbles and the liquid flow state. The passage of the bubbles could be roughly classified into three types, depending on the impeller rotational speed. We clarified quantitatively the liquid flow state by estimating the rate of the liquid flow entraining the bubbles. We estimated the rates based on the experimental data from dynamically sampling the liquid, which included a tracer injected to the vessel, with the aid of a numerical mixing model. We determined the mixing index and were able to estimate the mixing time from the liquid flow entraining the bubbles and the cavern volumes. The experimental data on the bubble passage by visual observation was in a good agreement with the experimental results measured by Electrical Resistance Tomography.
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