Partitioned-enclosure heat transfer with real and Boussinesq fluids
Thesis/Dissertation
·
OSTI ID:5322976
Strong natural convection airflows occur throughout passive solar building resulting from the disproportionment of captured solar radiation throughout the building mass. A building's geometric design influences the directions and magnitudes of natural airflows, and consequently heat transfer between different building zones. This investigation addressed with both numerical and similitude modeling methods, the effects of various building components on interzonal mass and heat exchange. Specifically, natural-convection heat transfer within enclosures fitted with incomplete partitions and driven by differentially heated opposing vertical surfaces was considered the domain of research. The experimental portion of the study utilized a 1/5 scale apparatus capable of modeling airflows in double-story buildings. Experimental results for six different partitioned enclosure configurations over a Rayleigh number range from 10/sup 9/ to 10/sup 11/ were obtained. The computational algorithms used the Marker and Cell (MAC) approach for transient multidimensional incompressible-fluid-flow problems, with modifications to include thermal buoyancy effects. The numerical portion of the study specifically addressed the two-dimensional partitioned enclosure problem. Combined experimental and numerical results indicate that three distinct flow regimes exist at the partition opening: conduction-dominated flow, bulk-density-driven flow, and boundary-layer flow.
- Research Organization:
- Colorado State Univ., Fort Collins (USA)
- OSTI ID:
- 5322976
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
140901* -- Solar Thermal Utilization-- Space Heating & Cooling
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
AIR FLOW
ALGORITHMS
BUILDINGS
CONVECTION
ENERGY SYSTEMS
ENERGY TRANSFER
EQUIPMENT
FLUID FLOW
GAS FLOW
HEAT TRANSFER
HEATING SYSTEMS
MASS TRANSFER
MATHEMATICAL LOGIC
MEASURING METHODS
NATURAL CONVECTION
NUMERICAL SOLUTION
PASSIVE SOLAR HEATING SYSTEMS
SCALE MODELS
SOLAR EQUIPMENT
SOLAR HEATING SYSTEMS
STRUCTURAL MODELS
140901* -- Solar Thermal Utilization-- Space Heating & Cooling
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
AIR FLOW
ALGORITHMS
BUILDINGS
CONVECTION
ENERGY SYSTEMS
ENERGY TRANSFER
EQUIPMENT
FLUID FLOW
GAS FLOW
HEAT TRANSFER
HEATING SYSTEMS
MASS TRANSFER
MATHEMATICAL LOGIC
MEASURING METHODS
NATURAL CONVECTION
NUMERICAL SOLUTION
PASSIVE SOLAR HEATING SYSTEMS
SCALE MODELS
SOLAR EQUIPMENT
SOLAR HEATING SYSTEMS
STRUCTURAL MODELS