Free convection around a horizontal circular cylinder. Adimensional empirical equations

1989 ◽  
Vol 46 (4) ◽  
pp. 365-378 ◽  
Author(s):  
R. Diez ◽  
M. Dolz ◽  
R. Belda ◽  
J. V. Herraez ◽  
M. Buendia
Keyword(s):  
Circular Cylinder ◽  
Free Convection ◽  
Empirical Equations ◽  
Horizontal Circular Cylinder

Laminar and Turbulent Free Convection From Elliptic Cylinders, With a Vertical Plate and Horizontal Circular Cylinder as Special Cases

1976 ◽  
Vol 98 (1) ◽  
pp. 72-80 ◽  
Author(s):  
G. D. Raithby ◽  
K. G. T. Hollands
Keyword(s):  
Heat Transfer ◽  
Circular Cylinder ◽  
Free Convection ◽  
Vertical Plate ◽  
Constant Heat Flux ◽  
Special Cases ◽  
Flux Boundary Conditions ◽  
Large Eccentricity ◽  
Rayleigh Numbers ◽  
Horizontal Circular Cylinder

Heat transfer by free convection from thin elliptic cylinders is predicted, accounting for both the effect of thick boundary layers at low Rayleigh numbers and the influence of turbulence at higher Rayleigh numbers. Isothermal and constant heat flux boundary conditions are treated. The results are compared with experimental data, which are available for the limiting cases of large eccentricity (vertical plate) and small eccentricity (horizontal circular cylinder); the agreement is excellent. Accurate correlation equations, from which the average heat transfer can be calculated, are given.

Free convection on heated horizontal circular cylinder in presence of heat generation

2014 ◽  
Author(s):  
Najahulfazliah Zainuddin ◽  
Ishak Hashim ◽  
Muhaimin Ismoen ◽  
Rozaini Roslan
Keyword(s):  
Circular Cylinder ◽  
Free Convection ◽  
Heat Generation ◽  
Horizontal Circular Cylinder

scholarly journals Oscillatory Free Convection about a Horizontal Circular Cylinder in the Presence of Heat Generation

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Najahulfazliah Zainuddin ◽  
Muhaimin Ismoen ◽  
Rozaini Roslan ◽  
Ishak Hashim
Keyword(s):  
Circular Cylinder ◽  
Free Convection ◽  
Newtonian Fluid ◽  
Heat Generation ◽  
Surrounding Medium ◽  
Surface Shear Stress ◽  
Surface Shear ◽  
Local Skin ◽  
Local Skin Friction ◽  
Horizontal Circular Cylinder

The oscillatory free convection about a horizontal circular cylinder in a Newtonian fluid in the presence of heat generation is investigated numerically by using the finite difference method. The surface temperature of the cylinder oscillates harmonically about the temperature of the surrounding medium. Heat is generated internally within the Newtonian fluid at a rate proportional to a power of the temperature difference. It is found that the presence of heat generation significantly increases the temperature and velocity distribution. The effects of the heat generation parameter and the Prandtl number on the surface rate of heat transfer, in terms of the local Nusselt number, and the surface shear stress, in terms of the local skin friction, are shown graphically from the stagnation point of the circular cylinder.

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