scholarly journals Turbulent Heat Transfer and Temperature Profile in the Thermal Entrance Region of a Circular Pipe

1966 ◽  
Vol 32 (238) ◽  
pp. 930-939
Author(s):  
Mikio HISHIDA
Keyword(s):  
Heat Transfer ◽  
Temperature Profile ◽  
Entrance Region ◽  
Turbulent Heat Transfer ◽  
Circular Pipe ◽  
Turbulent Heat ◽  
Thermal Entrance Region ◽  
Thermal Entrance

Turbulent Heat Transfer in a Symmetrically or Asymmetrically Heated Flat Rectangular Duct With Flow Separation at Inlet

1982 ◽  
Vol 104 (1) ◽  
pp. 82-89 ◽  
Author(s):  
E. M. Sparrow ◽  
N. Cur
Keyword(s):  
Heat Transfer ◽  
Flow Separation ◽  
Entrance Region ◽  
Turbulent Heat Transfer ◽  
Rectangular Duct ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients ◽  
Thermal Entrance Region ◽  
Asymmetric Heating ◽  
Thermal Entrance

Heat transfer experiments were performed for a high-aspect-ratio (∼18) rectangular duct having a sharp-edged inlet, with air being drawn into the inlet from a large upstream space. The experiments encompassed data runs where both of the principal walls of the duct were isothermal (at the same temperature) and other runs where one wall was isothermal while the other was adiabatic. Local heat transfer coefficients were determined for all runs. It was found that flow separation at the duct inlet played a decisive role in shaping the axial distribution of the heat transfer coefficient in the thermal entrance region. Of particular note is a high heat transfer peak at the point of flow reattachment. The peak is situated at an axial station less than one hydraulic diameter from the inlet and moves upstream with increasing Reynolds number. The heat transfer coefficients for symmetric and asymmetric heating are identical in the initial portion of the thermal entrance region. Deviations occur farther downstream but do not exceed more than about 7 percent. The entrance length for asymmetric heating is significantly greater than that for symmetric heating.

DNS study on turbulent heat transfer induced by turbulence at the inlet in entrance region of pipe

2020 ◽  
Vol 2020 (0) ◽  
pp. 0124
Author(s):  
Hirofumi HATTORI ◽  
Hiroki BABA ◽  
Haruka TADANO ◽  
Tomoya HOURA ◽  
Masato TAGAWA
Keyword(s):  
Heat Transfer ◽  
Entrance Region ◽  
Turbulent Heat Transfer ◽  
Turbulent Heat
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