Uniform flux heat transfer to a gas in laminar forced convection in a circular tube

AIChE Journal ◽  
1966 ◽  
Vol 12 (4) ◽  
pp. 648-655 ◽  
Author(s):  
Perry D. Bergman ◽  
Lowell B. Koppel
Keyword(s):  
Heat Transfer ◽  
Forced Convection ◽  
Circular Tube ◽  
Laminar Forced Convection

scholarly journals Laminar forced convection at low Péclet number. II

1972 ◽  
Vol 6 (1) ◽  
pp. 95-105 ◽  
Author(s):  
A.S. Jones
Keyword(s):  
Heat Transfer ◽  
Forced Convection ◽  
Poiseuille Flow ◽  
Peclet Number ◽  
Circular Tube ◽  
Péclet Number ◽  
Temperature Distributions ◽  
Laminar Forced Convection ◽  
Ring Source

In this paper, the problem of heat transfer to laminar Poiseuille flow in a circular tube is discussed for the case of an insulated tube with a ring source of heat on the boundary. The solution is developed analytically for low values of the Péclet number, and formulae for calculating the eigenvalues and coefficients have been obtained. The temperature distributions in the neighbourhood of the source have been calculated for two values of the Péclet number. The extension to the case of arbitrary wall flux has also been discussed.

An Experimental Investigation of Heat Transfer and Buoyancy Induced Transition from Laminar Forced Convection to Turbulent Free Convection over a Horizontal Isothermally Heated Plate

1978 ◽  
Vol 100 (3) ◽  
pp. 429-434 ◽  
Author(s):  
H. Imura ◽  
R. R. Gilpin ◽  
K. C. Cheng
Keyword(s):  
Heat Transfer ◽  
Free Convection ◽  
Forced Convection ◽  
Leading Edge ◽  
Finite Amplitude ◽  
Heated Plate ◽  
Transfer Rates ◽  
Longitudinal Vortices ◽  
Turbulent Flow Regime ◽  
Laminar Forced Convection

The flow over a horizontal isothermally heated plate at Reynolds numbers below that at which hydrodynamic instabilities exist, is characterized by a region of laminar forced convection near the leading edge, followed by the onset of longitudinal vortices and their growth to a finite amplitude and finally a transition to a turbulent flow regime. Results are presented for the temperature profiles, the thermal boundary layer thickness, and the local Nusselt number. They are used to identify the various flow regimes. It was found that the transition from laminar forced convection to turbulent convection was characterized by the parameter Grx/Rex1.5 falling in the range 100 to 300. For values of this parameter greater than 300 the heat transfer rates were independent of Reynolds number and typical of those for turbulent free convection from a horizontal surface.

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