A Comparison of Predicted and Measured Friction Factors for Turbulent Flow Through Rectangular Ducts
The friction coefficient for both laminar and turbulent flow through rectangular channels was analytically and experimentally studied. The analytic expression for the pressure loss in fully established laminar flow was verified by experiment. In turbulent flows the method of Deissler and Taylor was used to calculate the friction coefficient. The calculated and measured results were in agreement for ducts having large aspect ratios. At aspect ratios less than 5: 1, the predicted values of the friction factors were lower than the experimental data, with a maximum difference of 12 per cent evident for the square duct. It was found that the circular-tube correlation accurately predicts the friction coefficient for flow through rectangular ducts of any aspect ratio for Reynolds numbers between 6 x 10/sup 3/ and 5 x 105. Hydrodynamic entrance-length results are also presented in the laminar and turbulent flow ranges for both a smooth and an abrupt entrance configuration.
- Research Organization:
- Univ. of Minnesota, Minneapolis
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-008889
- OSTI ID:
- 4799831
- Journal Information:
- Journal of Heat Transfer, Journal Name: Journal of Heat Transfer Journal Issue: 1 Vol. 84; ISSN 0022-1481; ISSN JHTRAO
- Publisher:
- ASME
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
INCOMPRESSIBLE FRICTION FACTOR, TRANSITION AND HYDRODYNAMIC ENTRANCE LENGTH STUDIES OF DUCTS WITH TRIANGULAR AND RECTANGULAR CROSS-SECTIONS
Steady flow OF non-Newtonian fluids through rectangular ducts
Developing heat transfer and friction in a ribbed rectangular duct with flow separation at inlet
Technical Report
·
Sun Mar 31 23:00:00 EST 1957
·
OSTI ID:4309205
Steady flow OF non-Newtonian fluids through rectangular ducts
Journal Article
·
Sun Feb 28 23:00:00 EST 1993
· International Communications in Heat and Mass Transfer; (United States)
·
OSTI ID:6601859
Developing heat transfer and friction in a ribbed rectangular duct with flow separation at inlet
Journal Article
·
Sat Aug 01 00:00:00 EDT 1992
· Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)
·
OSTI ID:7016220