Natural Convection Heat Transfer From a Horizontal Circular Cylinder With Constant Surface Heat Flux

2009 ◽  
Author(s):  
Maria Neagu
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Circular Cylinder ◽  
Surface Heat Flux ◽  
Convection Heat Transfer ◽  
Surface Heat ◽  
Governing Equations ◽  
System Parameters ◽  
The Finite Difference Method ◽  
Horizontal Circular Cylinder

This work analyses the natural convective heat transfer from a horizontal circular cylinder with constant surface heat flux using radial equally spaced exterior low conductivity baffles. The dimensionless governing equations in the stream function–vorticity formulation were solved using the finite difference method. The influence of the system parameters, the number of baffles and the baffle height, on the average Nusselt number is presented.

An Analysis of Combined Free and Forced Convection Heat Transfer From a Horizontal Circular Cylinder to a Transverse Flow

1971 ◽  
Vol 93 (4) ◽  
pp. 441-448 ◽  
Author(s):  
N. D. Joshi ◽  
S. P. Sukhatme
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Circular Cylinder ◽  
Differential Equations ◽  
Surface Temperature ◽  
Convection Heat Transfer ◽  
Transverse Flow ◽  
Convection Heat ◽  
Free And Forced Convection ◽  
Horizontal Circular Cylinder

Combined free and forced convection heat transfer from a horizontal circular cylinder to a transverse flow is analysed for the case when the forced flow is either in the direction of the free convection flow (parallel flow) or in the direction opposite to it (counter flow). The problem is solved for two cases: (1) a specified surface temperature variation and (2) a specified wall heat flux variation along the circumference. A coordinate perturbation method is used to transform the governing set of partial differential equations into a system of ordinary differential equations, which are solved by numerical methods. The numerical work is done for the boundary conditions of constant surface temperature and constant wall heat flux. The variation of local heat transfer coefficient and wall shear stress along the circumference up to the point of separation and velocity and temperature profiles in the boundary layer are obtained for varying values of the governing parameters Gr/Re2 in the constant temperature case (or Gr/Re2 in the constant heat flux case) and Pr.

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