| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
In this study, the effect of the wall surface wettability on bubble motion characteristics has been investigated experimentally. The probability density distribution of bubbles near the wall increases at higher wettability, and as a result, the increase in the bubble rise velocity occurs at higher wettability. In addition, temperature measurements of natural convection gas-liquid two-phase flows have been performed using a functional plate with two types of wettability (i.e., hydrophobicity and hydrophilicity). The heat transfer coefficient with the functional plate increases by 5 %. This increase is due to the suppression of the wall-normal bubble diffusion resulting from bubble capturing at the hydrophobic region.
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