Natural convection in air layers at various aspect ratios and angles of inclination
Abstract
The results of an experimental investigation of natural convection in air layers at various aspect ratios and angles are presented. The Rayleigh numbers range from subcritical to 1,000,000; the angle of inclination, measured from the horizontal, ranges from 0 to 90 deg. From an analysis of the physical model and the experimental measurements, several experimental nondimensional formulas are proposed. Special attention is given to the influence of the aspect ratio on heat transfer. The influence is found to differ with the range of the aspect ratio, being more pronounced in the range of low aspect ratios. The applicability of the recommended relationships to the design of solar collectors is stressed.
- Publication:
-
Engineering Thermophysics China
- Pub Date:
- December 1981
- Bibcode:
- 1981CEnTp...1..385L
- Keywords:
-
- Air Flow;
- Aspect Ratio;
- Computational Fluid Dynamics;
- Convective Flow;
- Heat Transfer;
- Solar Collectors;
- Flat Plates;
- Flow Distribution;
- Flow Theory;
- Rayleigh Number;
- Structural Design;
- Fluid Mechanics and Heat Transfer