RESEARCH ON HEAT TRANSFER TO FLUIDS FLOWING THROUGH NON-CIRCULAR CHANNELS. Progress Report, September 1960-March 1961

Technical Report · Wed Mar 01 04:00:00 EST 1961

OSTI ID:4060438

Eckert, E R.G.; Novotny, J L

Turbulent heat transfer was measured in rectangular ducts of aspect ratio 1: 1 having a thermal boundary condition of two vertical walls approximating an adiabatic boundary and two horizontal walls approximating a constant heat flux boundary. Measurements were made to determine the low Reynolds number limit, the bulk temperature rise consistent with constant property assumption and structural limitations, and the heat transfer coefficient as a function of distance along the axis of the duct. The centerline temperature distribution of the heated walls for a heat transfer run with a bulk temperature rise of 61.8 deg F. The Nusselt number was calculated from the fully developed heat transfer coefficient, the hydraulic diameter, and the thermal conductivity based on the average bulk temperature for the duct. Heat transfer for flow in rectangular ducts was also calculated for the following boundary conditions: constant wall temperature peripherally with constant axial heat flux and constant axial and peripheral heat flux. The calculations were carried out by use of the Deissler method. (M.C.G.)

• Research Organization: Minnesota. Univ., Minneapolis. Heat Transfer Lab.
• NSA Number: NSA-15-014392
• OSTI ID: 4060438
• Report Number(s): TID-12310
• Country of Publication: United States
• Language: English

Related Subjects

CONFIGURATION
COOLANT LOOPS
DISTRIBUTION
ENGINEERING AND EQUIPMENT
FLUID FLOW
HEAT TRANSFER
HEATING
HYDRAULICS
MATHEMATICS
MEASURED VALUES
NUSSELT NUMBER
PIPES
QUANTITATIVE ANALYSIS
REYNOLDS NUMBER
STANDARDS
SURFACES
TEMPERATURE
THERMAL CONDUCTIVITY
THERMODYNAMICS
TURBULENCE
USES