Turbulent heat transfer with combined forced and natural convection along a vertical flat plate. Effect of Prandtl number
- Toyota College of Technology (JP)
- Toyohashi Univ. of Technology (JP)
The turbulent heat transfer of combined forced and natural convection along a vertical flat plate was investigated experimentally both with aiding and opposing flows of air. Local heat-transfer coefficients were measured in the vertical direction. The results show that the local Nusselt numbers for aiding flow become smaller than those for the forced and the natural convection, while the Nusselt numbers for the opposing flow are increased significantly. These results are compared with the previous results for water. It has been found that the nondimensional parameter Z(= Gr{sub x}*/Nu{sub x}Re{sub x}){sup 2.7}Pr{sup 0.6} can predict the behavior of heat transfer both for air and water. Furthermore, the natural, forced, and combined convection regions can be classified in terms of the above parameter.
- OSTI ID:
- 6427618
- Journal Information:
- Heat Transfer - Japanese Research; (USA), Journal Name: Heat Transfer - Japanese Research; (USA) Vol. 19:2; ISSN 0096-0802; ISSN HTJPA
- Country of Publication:
- United States
- Language:
- English
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141000 -- Solar Collectors & Concentrators
142000 -- Solar Energy-- Heat Storage-- (1980-)
42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
AIR
AIR FLOW
CONVECTION
DATA
ENERGY TRANSFER
EQUIPMENT
EXPERIMENTAL DATA
FLAT PLATE COLLECTORS
FLUID FLOW
FLUIDS
FORCED CONVECTION
GAS FLOW
GASES
HEAT TRANSFER
HYDROGEN COMPOUNDS
INFORMATION
MASS TRANSFER
MEASURING METHODS
NATURAL CONVECTION
NUMERICAL DATA
NUSSELT NUMBER
OXYGEN COMPOUNDS
PRANDTL NUMBER
SOLAR COLLECTORS
SOLAR EQUIPMENT
TURBULENT FLOW
WATER