| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Outline of Final Research Achievements |
It is known that the unstable flow due to buoyancy causes a non-uniform film-deposition over heated silicon substrate in a barrel or pedestal CVD reactor. In the present study, the flow instability due to buoyancy was exploited experimentally through the flow visualizations. Heat transfer measurements were also carried out to investigate the influence of the flow instability on the local heat transfer from the plate. The experiments were conducted with the upward-facing, heated wedges placed in a uniform vertical downward flow of air, which simulates the aforementioned reactors. The wedge-angle was varied systematically from vertical to horizontal. The results showed that the flow is most stable when the wedge-angles from 135 to 110°, besides that the heat transfer coefficients from the wedge become uniform at the identical angles.
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