Turbulent heat transfer with combined forced and natural convection along a vertical flat plate
- Toyota College of Technology (JP)
- Faculty of Engineering, Toyohashi Univ. of Technology (JP)
The mechanisms of the retardation and enhancement of heat transfer in the combined convection region of aiding and opposing flows were investigated both experimentally and analytically. The surface temperature distributions were visualized by a liquid crystal sheet. The results show that low-temperature streaks or spots of large sizes appear in the whole regions of forced, natural, and combined convections, and they exert a significant role a on the heat transfer. Such low-temperature streaks or spots are generated as a result of the penetration of low-temperature fluid lumps into the near wall regions. The surface renewal model is proposed to simulate the heat transport by the above fluid motion. It is found that the model predicted the heat transfer of the combined convection quite satisfactorily.
- OSTI ID:
- 6427621
- Journal Information:
- Heat Transfer - Japanese Research; (USA), Vol. 19:2; ISSN 0096-0802
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
FLAT PLATE COLLECTORS
TURBULENT FLOW
SURFACES
TEMPERATURE DISTRIBUTION
ANALYTICAL SOLUTION
CALCULATION METHODS
EXPERIMENTAL DATA
FORCED CONVECTION
LIQUID CRYSTALS
LOW TEMPERATURE
NATURAL CONVECTION
SIMULATION
CONVECTION
CRYSTALS
DATA
ENERGY TRANSFER
EQUIPMENT
FLUID FLOW
FLUIDS
HEAT TRANSFER
INFORMATION
LIQUIDS
MASS TRANSFER
NUMERICAL DATA
SOLAR COLLECTORS
SOLAR EQUIPMENT
420400* - Engineering- Heat Transfer & Fluid Flow
141000 - Solar Collectors & Concentrators
142000 - Solar Energy- Heat Storage- (1980-)