Heat convection in micropolar nanofluid through porous medium-filled rectangular open enclosure: effect of an embedded heated object with different geometries

2020 ◽  
Author(s):  
Endalkachew Getachew Ushachew ◽  
Mukesh Kumar Sharma ◽  
O. D. Makinde
Keyword(s):  
Porous Medium ◽  
Heat Convection ◽  
Micropolar Nanofluid ◽  
Heated Object

scholarly journals Mixed Convective Flow of Micropolar Nanofluid across a Horizontal Cylinder in Saturated Porous Medium

2019 ◽  
Vol 9 (23) ◽  
pp. 5241 ◽  
Author(s):  
Ahmed M. Rashad ◽  
Waqar A. Khan ◽  
Saber M. M. EL-Kabeir ◽  
Amal M. A. EL-Hakiem
Keyword(s):  
Heat Transfer ◽  
Porous Medium ◽  
Convective Flow ◽  
Volume Fraction ◽  
Saturated Porous Medium ◽  
Titania Nanoparticles ◽  
Flow And Heat Transfer ◽  
Micropolar Nanofluid ◽  
Mixed Convective Flow ◽  
The Impact

The micropolar nanofluids are the potential liquids that enhance the thermophysical features and ability of heat transportation instead of base liquids. Alumina and Titania nanoparticles are mixed in a micropolar fluid. The impact of convective boundary condition is also examined with assisting and opposing flows of both nanofluids. The main objective of this study is to investigate mixed convective flow and heat transfer of micropolar nanofluids across a cylinder in a saturated porous medium. Non-similar variables are used to make the governing equations dimensionless. The local similar and non-similar solutions are obtained by using the Runge-Kutta-Fehlberg method of seventh order. The impacts of various embedded variables on the flow and heat transfer of micropolar nanofluids are investigated and interpreted graphically. It is demonstrated that the skin friction and heat transfer rates depend on solid volume fraction of nanoparticles, Biot number, mixed convection, and material parameters.

scholarly journals On the Hydrodynamics and Heat Convection of an Impinging External Flow Upon a Cylinder with Transpiration and Embedded in a Porous Medium

2017 ◽  
Vol 120 (3) ◽  
pp. 579-604 ◽  
Author(s):  
Rasool Alizadeh ◽  
Asghar B. Rahimi ◽  
Nader Karimi ◽  
Ahmad Alizadeh
Keyword(s):  
Porous Medium ◽  
External Flow ◽  
Heat Convection

Simultaneous imbibition–heat convection process in a non-Darcian porous medium

2005 ◽  
Vol 288 (2) ◽  
pp. 562-569 ◽  
Author(s):  
M. Sánchez ◽  
E. Luna ◽  
A. Medina ◽  
F. Méndez
Keyword(s):  
Porous Medium ◽  
Heat Convection

Flow and Heat Transfer in Nanofluid Flow through a Cylinder Filled with Foam Porous Medium under Radial Injection

2018 ◽  
Vol 387 ◽  
pp. 166-181 ◽  
Author(s):  
Mukesh Kumar Sharma ◽  
Choudhary Manjeet ◽  
Oluwole Daniel Makinde
Keyword(s):  
Heat Transfer ◽  
Porous Medium ◽  
Volume Fraction ◽  
Heat Convection ◽  
Viscous Drag ◽  
Physical Parameters ◽  
Cylindrical Shape ◽  
Flow And Heat Transfer ◽  
Radial Injection ◽  
Shape Of Nanoparticles

The Darcy flow and heat convection in nanofluid through a cylinder filled with a foam porous medium subject to local non-thermal equilibrium (LNTE) condition and uniform radial injection on the outer wall of the cylinder is studied. The momentum and two-energy equations are solved by differential transformation method (DTM) in the form of stream function using similarity variables. The effect on flow and heat transfer of different types of nanofluids and involved physical parameters Prandtl number Pr, Reylond number Re, Darcy number Da, Biot number Bi, Ratio of thermal conductivities Rk, porosity parameter ε, solid volume fraction parameter φ and shape of nanoparticles are analyzed through graphs. The viscous drag force and heat convection at the wall of the cylinder is calculated in terms of non-dimensional skin-friction coefficient and Nusselt number respectively. Decreasing the porosity of foam porous medium causes increment in magnitude of heat transfer rate for both the phases. Spherical shape of nanoparticles transfers more heat in comparison of cylindrical shape nanoparticles. Amongst the nanofluid H2O-Ag, H2O-Cu and H2O-Al2O3 the magnitude of heat transfer for fluid phase Nuf is lowest for nanofluid H2O-Al2O3.

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