DNS for Transient Phenomena of Compressible Turbulent Flow Through a Square Duct by Suddenly Setting Adiabatic Condition at One Wall

2020 ◽  
Vol 2020.69 (0) ◽  
pp. 507
Author(s):  
Shota ISHIWARI ◽  
Masayoshi OKAMOTO
Keyword(s):  
Turbulent Flow ◽  
Adiabatic Condition ◽  
Square Duct ◽  
Transient Phenomena ◽  
Flow Through ◽  
Compressible Turbulent Flow

scholarly journals Numerical simulation of turbulent flow through a straight square duct using a near wall lineark–ϵmodel

2007 ◽  
Vol 1 (3) ◽  
pp. 317-336
Author(s):  
Ahmed Rechia ◽  
Hassan Naji ◽  
Gilmar Mompean ◽  
Abdelatif El Marjani
Keyword(s):  
Numerical Simulation ◽  
Turbulent Flow ◽  
Square Duct ◽  
Flow Through ◽  
Near Wall

A Comparison of Predicted and Measured Friction Factors for Turbulent Flow Through Rectangular Ducts

1962 ◽  
Vol 84 (1) ◽  
pp. 82-88 ◽  
Author(s):  
J. P. Hartnett ◽  
J. C. Y. Koh ◽  
S. T. McComas
Keyword(s):  
Friction Coefficient ◽  
Turbulent Flow ◽  
Reynolds Numbers ◽  
Square Duct ◽  
Aspect Ratios ◽  
Friction Factors ◽  
Rectangular Channels ◽  
Laminar And Turbulent Flow ◽  
Flow Through ◽  
Predicted Values

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 flow, 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 × 103 and 5 × 105. Hydrodynamic entrance-length results are also presented in the laminar and turbulent flow ranges for both a smooth and an abrupt entrance configuration.

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