Experimental study of local natural convection heat transfer in inclined and rotating enclosures
The local and mean natural-convection heat-transfer characteristics were studied experimentally in an air-filled differentially heated enclosure with cross-sectional aspect-ratio one. A Mach-Zehnder interferometer was employed to reveal the entire temperature field, which enables the measurement of the local and mean Nusselt numbers at the hot and cold surfaces. The first part of this investigation was a study of the inclination effect on the flow and heat-transfer behaviors. The measurements of local and mean Nusselt numbers are obtained at various inclination angles, ranging between 0/sup 0/ (heated from above) and 180/sup 0/. (Benard convection, heated from below), for Rayleigh numbers between 10/sup 4/ and 10/sup 6/. The measured heat flux at the hot and cold boundaries showed a strong dependence on the angle of inclination and Rayleigh number. In the second part, the study is extended to include the effect of combined heating and rotation on the thermal and hydrodynamic boundary layers. The enclosure is rotated about its longitudinal horizontal axis. Experimental results showed how the centrifugal and Coriolis forces arising from rotation have remarkably influenced the local heat transfer behavior when compared with the non-rotating results.
- Research Organization:
- Michigan State Univ., East Lansing (USA)
- OSTI ID:
- 7002776
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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