Mixed convection boundary layer flow at the lower stagnation point of a sphere embedded in a porous medium in presence of heat source/sink: Constant heat flux case

2014 ◽  
Author(s):  
Nur Fatihah Fauzi ◽  
Syakila Ahmad ◽  
Ioan Pop
Keyword(s):  
Boundary Layer ◽  
Heat Flux ◽  
Porous Medium ◽  
Heat Source ◽  
Constant Heat Flux ◽  
Convection Boundary Layer ◽  
Constant Heat ◽  
Convection Boundary ◽  
Layer Flow ◽  
Source Sink

Natural Convection Boundary Layer Flow Past a Sphere with Constant Heat Flux in Viscoelastic Fluid

2013 ◽  
Vol 62 (3) ◽  
Author(s):  
Abdul Rahman Mohd Kasim ◽  
Nurul Farahain Mohammad ◽  
Aurangzaib A. ◽  
Sharidan Shafie
Keyword(s):  
Boundary Layer ◽  
Heat Flux ◽  
Natural Convection ◽  
Viscoelastic Fluid ◽  
Constant Heat Flux ◽  
Convection Boundary Layer ◽  
Constant Heat ◽  
Boundary Layer Equations ◽  
Convection Boundary ◽  
Layer Flow

The steady natural convection boundary layer flow of a viscoelastic fluid over a solid sphere with constant heat flux is studied in this paper. The boundary layer equations of viscoelastic fluid are an order higher than those for the Newtonian (viscous) fluid. The adherence boundary conditions are insufficient to determine the solution of these equations completely. Thus, the augmentation an extra boundary condition is needed to perform the numerical computational. The governing boundary layer equations are first transformed into non–dimensional form by using special dimensionless variables and then solved by using an implicit finite difference scheme known as Keller box method. Numerical results for the velocity and temperature profiles, wall temperature, as well as skin friction are shown graphically for different values of viscoelastic parameters and Prandtl number. It is found that, when the viscoelastic parameter increased, the values of skin friction decreased while the values of wall temperature are increased.

Constant heat flux solution for mixed convection boundary layer viscoelastic fluid

2012 ◽  
Vol 49 (2) ◽  
pp. 163-171 ◽  
Author(s):  
Abdul Rahman Mohd Kasim ◽  
Nurul Farahain Mohammad ◽  
Sharidan Shafie ◽  
Ioan Pop
Keyword(s):  
Boundary Layer ◽  
Heat Flux ◽  
Mixed Convection ◽  
Viscoelastic Fluid ◽  
Constant Heat Flux ◽  
Convection Boundary Layer ◽  
Constant Heat ◽  
Convection Boundary
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