Effects of inner rotating horizontal cylinder on heat transfer in a differentially heated enclosure
The effects of an inner rotating horizontal cylinder on heat transfer in a differentially heated enclosure were investigated experimentally. The aspect ratio of the enclosure height/width was 1:1 in these experiments. A polypropylene cylinder was installed horizontally at the center of a square enclosure and rotated at various speeds. The working fluid was purified water. The surface temperature of the rotating cylinder was measured with a telemetry system; the flow pattern was sketched by a visualization experiment using aluminum powder. It was shown that the rotating cylinder suppresses the heat-transfer rate of the enclosure in the low rotating-speed range-due to the interference between natural and forced convections. However, marked heat-transfer enhancement can be obtained in the high rotating-speed range. The rotating cylinder used here is useful for thermal regulation over a wide range of heat-transfer rates.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 451991
- Journal Information:
- Heat Transfer - Japanese Research, Journal Name: Heat Transfer - Japanese Research Journal Issue: 6 Vol. 24; ISSN 0096-0802; ISSN HTJPAU
- Country of Publication:
- United States
- Language:
- English
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