Effect of an unheated entry on natural convection between vertical parallel plates
Conference
·
OSTI ID:5751748
Experimental results for natural convection of air between isothermal parallel plates which have an unheated entry section are reported. Data were collected where the unheated length was 0%, 60%, and 80% of the total height of the channel. Experiments were performed over a Rayleigh number range which extended from the fully developed regime (plate spacing-to-plate height small) to the single plate limit (large plate-to-plate spacing). Theoretical correlations for systems with small plate-to-plate spacing are developed. Local surface heat flux and plate surface temperatures were measured using a holographic interferometer. The overall surface conductance was then computed via a suitable numerical integration of the local data. Flows with large plate-to-plate spacings are insensitive to the presence of the unheated entry section. Convection is accurately predicted using the classical similarity analysis for a single isothermal plate in a quiescent environment. Flows with small plate-to-plate spacing are severely affected by the presence of an unheated section. The theoretical correlation proposed accurately predicts the convection under these conditions. An empirical correlation which spans the entire flow regime is suggested.
- OSTI ID:
- 5751748
- Report Number(s):
- CONF-851125-
- Country of Publication:
- United States
- Language:
- English
Similar Records
Natural convection in vertical parallel plates with an unheated entry or unheated exit
Turbulent mixed convection along a vertical plate
An experimental study of natural convection in a vertical cavity with discrete heat sources
Journal Article
·
Thu Mar 31 23:00:00 EST 1994
· Numerical Heat Transfer. Part A, Applications; (United States)
·
OSTI ID:7235266
Turbulent mixed convection along a vertical plate
Journal Article
·
Sat Jan 31 23:00:00 EST 1987
· Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States)
·
OSTI ID:5403548
An experimental study of natural convection in a vertical cavity with discrete heat sources
Journal Article
·
Mon Aug 01 00:00:00 EDT 1988
· Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States)
·
OSTI ID:5483694
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AIR
BENCH-SCALE EXPERIMENTS
COMPARATIVE EVALUATIONS
CONVECTION
DATA
DIMENSIONS
DISTANCE
ENERGY TRANSFER
EXPERIMENTAL DATA
FLUIDS
FORECASTING
GASES
HEAT FLOW
HEAT FLUX
HEAT TRANSFER
HEATING
HEIGHT
HOLOGRAPHY
INFORMATION
INTERFEROMETERS
ISOTHERMAL PROCESSES
MASS TRANSFER
MEASURING INSTRUMENTS
NATURAL CONVECTION
NUMERICAL DATA
PHYSICAL PROPERTIES
PLATES
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
VARIATIONS
400201* -- Chemical & Physicochemical Properties
AIR
BENCH-SCALE EXPERIMENTS
COMPARATIVE EVALUATIONS
CONVECTION
DATA
DIMENSIONS
DISTANCE
ENERGY TRANSFER
EXPERIMENTAL DATA
FLUIDS
FORECASTING
GASES
HEAT FLOW
HEAT FLUX
HEAT TRANSFER
HEATING
HEIGHT
HOLOGRAPHY
INFORMATION
INTERFEROMETERS
ISOTHERMAL PROCESSES
MASS TRANSFER
MEASURING INSTRUMENTS
NATURAL CONVECTION
NUMERICAL DATA
PHYSICAL PROPERTIES
PLATES
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
VARIATIONS