Magnetohydrodynamics-Mixed Convection From Radiate Vertical Isothermal Surface Embedded in a Saturated Porous Media

2005 ◽  
Vol 73 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Rebhi A. Damseh
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Porous Media ◽  
Mixed Convection ◽  
Transfer Problem ◽  
Radiation Heat Transfer ◽  
Convection Heat Transfer ◽  
Heat Transfer Problem ◽  
Convection Heat ◽  
Mixed Convection Heat Transfer

The magnetohydrodynamics-mixed convection heat transfer problem from a vertical surface embedded in a porous media is studied. The effects of transverse magnetic field and radiation heat transfer are examined. Both cases of the mixed convection heat transfer problem, namely: the buoyancy aiding flow and the buoyancy opposing flow are investigated. It is found that three dimensionless groups can describe the problem under consideration, the mixed convection parameter ζ, the radiation-conduction parameter Rd, and the magnetic field number Hax2∕Rex. Different velocity profiles, temperature profiles, and the local Nusselt number variations are also drawn.

scholarly journals Mixed convection heat transfer past in-line square cylinders in a vertical duct

2013 ◽  
Vol 17 (2) ◽  
pp. 567-580 ◽  
Author(s):  
Dipankar Chatterjee ◽  
Mohammad Raja
Keyword(s):  
Heat Transfer ◽  
Mixed Convection ◽  
Transfer Problem ◽  
Convection Heat Transfer ◽  
Skin Friction Coefficient ◽  
Convection Heat ◽  
Flow And Heat Transfer ◽  
Square Cylinders ◽  
Mixed Convection Heat Transfer ◽  
Vertical Duct

The mixed convection heat transfer around five in-line isothermal square cylinders periodically arranged within a vertical duct is numerically investigated in this paper. Spacing between two cylinders (S) is fixed at one width of the cylinder dimension (d) and the flow confinement of various degrees are studied for the blockage ratios of B = 0%, 10%, 25% and 50%. The buoyancy aided/opposed convection is examined for the Richardson number (Ri) ranges from -1 to +1 with a fixed Prandtl number Pr = 0.7 and Reynolds number Re = 100. The transient numerical simulation for this two-dimensional, incompressible, laminar flow and heat transfer problem is carried out by a finite volume based commercial CFD package FLUENT TM. The representative streamlines and isotherm patterns are presented to interpret the flow and thermal transport visualization. Additionally, the time and surface average skin friction coefficient (Cf), drag (CD) and lift (CL) coefficients as well as the time and surface average Nusselt number (Nu) for representative cylinders are determined to elucidate the effects of Re and Ri on the flow and heat transfer phenomena.

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