Non-Newtonian effect on natural convection flow over cylinder of elliptic cross section

2019 ◽  
Vol 41 (2) ◽  
pp. 361-382 ◽  
Author(s):  
P. Nag ◽  
M. M. Molla ◽  
M. A. Hossain
Keyword(s):  
Natural Convection ◽  
Cross Section ◽  
Convection Flow ◽  
Elliptic Cross Section ◽  
Natural Convection Flow ◽  
Elliptic Cross ◽  
Flow Over Cylinder

Natural Convection Heat and Mass Transfer From a Horizontal Cylinder of Elliptic Cross Section with Constant Wall Temperature and Concentration in Saturated Porous Media

2006 ◽  
Vol 22 (3) ◽  
pp. 257-261 ◽  
Author(s):  
C.-Y. Cheng
Keyword(s):  
Mass Transfer ◽  
Natural Convection ◽  
Heat And Mass Transfer ◽  
Cross Section ◽  
Wall Temperature ◽  
Horizontal Cylinder ◽  
Elliptic Cross Section ◽  
Convection Heat ◽  
Constant Wall Temperature ◽  
Elliptic Cross

AbstractThis work studies the natural convection heat and mass transfer near a horizontal cylinder of elliptic cross section with constant wall temperature and concentration in a fluid-saturated porous medium. A coordinate transformation is used to obtain the nonsimilar governing boundary layer equations. The transformed governing equations are then solved by the cubic spline collocation method. Results for the local Nusselt and Sherwood numbers are presented as functions of the Lewis number, the buoyancy ratio, and the aspect ratio when the major axis of the elliptical cylinder is vertical (slender orientation) and horizontal (blunt orientation). The heat and mass transfer rates of the elliptical cylinder with slender orientation are higher than those with blunt orientation.

Effect of thermal radiation on natural convection over cylinders of elliptic cross section

1998 ◽  
Vol 129 (3-4) ◽  
pp. 177-186 ◽  
Author(s):  
M. A. Hossain ◽  
M. A. Alim ◽  
D. A. S. Rees
Keyword(s):  
Natural Convection ◽  
Thermal Radiation ◽  
Cross Section ◽  
Elliptic Cross Section ◽  
Elliptic Cross

scholarly journals Effect of thermal radiation on unsteady mixed convection flow near forward stagnation point over a cylinder of elliptic cross section

2017 ◽  
Vol 21 (1 Part A) ◽  
pp. 243-254 ◽  
Author(s):  
Tariq Javed ◽  
Irfan Mustafa ◽  
Hussain Ahmad
Keyword(s):  
Nusselt Number ◽  
Mixed Convection ◽  
Thermal Radiation ◽  
Stagnation Point ◽  
Cross Section ◽  
Convection Flow ◽  
Elliptic Cross Section ◽  
Mixed Convection Flow ◽  
Unsteady Mixed Convection ◽  
Elliptic Cross

The effect of thermal radiation on unsteady mixed convection flow near a forward stagnation point over a cylinder of elliptic cross section is investigated in this paper. The governing equations are transformed into dimensionless partial differential equations by using a suitable transformation and then are solved numerically by using an implicit finite difference scheme known as Keller Box method. The accuracy of the results is verified by comparing the obtained results with the previous studies available in the literature. It is shown that the results are highly accurate and are in good agreement. The separation times for both blunt and slender orientations in the presence of thermal radiation are shown in tabular forms. Moreover, the effects of pertinent parameters including Prandtl number Pr, mixed convection parameter ?, thermal radiation parameter Rd, surface temperature parameter qw and blunt/slender orientation parameter w on the velocity profile, the temperature profile and the Nusselt number are shown graphically. From the present study, it is observed that boundary layer separation occurs early due to thermal radiation and Nusselt number increases for both blunt and slender orientations.

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