| Budget Amount *help |
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2015: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2014: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
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| Outline of Final Research Achievements |
An investigation was conducted to explore an innovative heat transfer enhancement using a conduit filled with a nanofluid saturated metal foam. Alumina-water nanofluid exhibits an increase of 6% in its effective thermal conductivity, while that of diamond-water nanofluid reaches only 2%. Thus, the effective thermal conductivity of nanofluid depends not only on the nanoparticle thermal conductivity and volume fraction but also on various other factors. Anomalous heat transfer, namely, heat transfer increase more than expected from its thermal conductivity increase, was predicted in the present theory. However, such anomaly was not clearly captured by the present experiment, since heat transfer enhancement due to thermal dispersion in a metal foam overwhelms the anomaly. The present theoretical and experimental study clearly shows that forced convection in a conduit filled with a nanofluid saturated metal foam is quite promising in view of innovative heat transfer enhancement..
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