scholarly journals Investigation of Simultaneous Effects of Surface Roughness, Porosity, and Magnetic Field of Rough Porous Microfin Under a Convective–Radiative Heat Transfer for Improved Microprocessor Cooling of Consumer Electronics

2019 ◽  
Vol 9 (2) ◽  
pp. 235-246 ◽  
Author(s):  
George A. Oguntala ◽  
Gbeminiyi M. Sobamowo ◽  
Nnabuike N. Eya ◽  
Raed A. Abd-Alhameed
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Surface Roughness ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Consumer Electronics

Magnetohydrodynamic Flow Past a Vertical Plate With Radiative Heat Transfer

2007 ◽  
Vol 129 (12) ◽  
pp. 1708-1713 ◽  
Author(s):  
S. Shateyi ◽  
P. Sibanda ◽  
S. S. Motsa
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Radiative Heat Transfer ◽  
Radiation Effects ◽  
Vertical Plate ◽  
Radiative Heat ◽  
Tangential Direction ◽  
Magnetohydrodynamic Flow ◽  
Lateral Direction ◽  
Flow Past

The problem of steady, laminar, magnetohydrodynamic flow past a semi-infinite vertical plate is studied. The primary purpose of this study was to characterize the effects of thermal radiative heat transfer, magnetic field strength, and Hall currents on the flow properties. The governing nonlinear coupled differential equations comprising the laws of mass, linear momentum, and energy modified to include magnetic and radiative effects were solved numerically. The effects of the Hall current, the Hartmann number, and the radiative parameter on the velocity and temperature profiles are presented graphically. Large Hall currents and radiation effects cause the fluid to heat up and the velocity to increase in the lateral direction but decrease in the tangential direction. This study showed inter alia that reducing Hall currents and increasing the strength of the magnetic field lead to a reduction in the temperature and, consequently, in the thermal boundary layer, and so confirming that heat transfer mitigation through magnetic control is possible.

scholarly journals Magnetic field control of near-field radiative heat transfer and the realization of highly tunable hyperbolic thermal emitters

2015 ◽  
Vol 92 (12) ◽  
Author(s):  
E. Moncada-Villa ◽  
V. Fernández-Hurtado ◽  
F. J. García-Vidal ◽  
A. García-Martín ◽  
J. C. Cuevas
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Near Field ◽  
Thermal Emitters ◽  
Field Control

Magnetic-field control of near-field radiative heat transfer between graphene-based hyperbolic metamaterials

2020 ◽  
Vol 117 (16) ◽  
pp. 163901
Author(s):  
Bo Zhang ◽  
Jinlin Song ◽  
Lu Lu ◽  
Bowen Li ◽  
Kun Zhou ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Near Field ◽  
Hyperbolic Metamaterials ◽  
Field Control

Radiative heat transfer in a magnetic field

Astrophysics ◽  
1977 ◽  
Vol 13 (1) ◽  
pp. 89-95 ◽  
Author(s):  
G. G. Pavlov ◽  
D. G. Yakovlev
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Radiative Heat Transfer ◽  
Radiative Heat

Magneto-Hemodynamics Mixed Convection with Radiative Heat Transfer in a Stenosed Artery

2017 ◽  
Vol 378 ◽  
pp. 68-84 ◽  
Author(s):  
Korande Fonso Ngufor ◽  
Oluwole Daniel Makinde
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Mixed Convection ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Variable Viscosity ◽  
Perturbation Technique ◽  
Fluid Velocity ◽  
Stenosed Artery ◽  
Percentage Volume

The hemodynamics mixed convection in a stenosed artery with radiative heat transfer in the presence of magnetic field is investigated. Blood is regarded as a viscous, incompressible, Newtonian, electrically conducting and optically dense bio-magnetic fluid. The variable viscosity of blood depending on hematocrit (percentage volume of erythrocytes) is taken into account in order to improve resemblance to the real situation. The constriction in the artery due to stenosis is assumed to be symmetrical such that the stenotic height is small compared with the half width of the unconstricted channel. The governing equations of momentum and energy balance are obtained and solved both numerically using a shooting technique coupled with Runge-Kutta-Fehlberg integration method and analytically using a well known perturbation technique. The effects of various controlling parameters on the dimensionless velocity, temperature, pressure gradient, skin friction and Nusselt number are presented graphically and discussed. It is observed that the flow rate at the stenotic region is enhanced by buoyancy force. The fluid velocity decreases while the temperature increases with an in magnetic field intensity. Our results could be useful in improving the design of flow meters in bio-medical instrumentation for detecting cardiovascular pathological conditions such as stenosis.

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