| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
The structure of floc dose not vary during settling process. This prediction by Michaels and Bolger was proved to be valid for only below the concentration of 0.74 volume fraction (maximum packing). This result means that the rigid sphere model can be applied for only below the volume fraction of 0.74. Therefore, the structure of floc seems to be strong in the settling process but the weak structures were found in the packing process. Those structures were network structure, minimum packing structure and maximum packing structure. These structures were rather stable for weak stress and were found to exist by the measurement of ultimate sediment volume.
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