MHD Free Convection of Localized Heat Source/Sink in Hybrid Nanofluid-Filled Square Cavity

2020 ◽  
Vol 9 (1) ◽  
pp. 1-12
Author(s):  
Ali J. Chamkha ◽  
Rizk Yassen ◽  
Muneer A. Ismael ◽  
A.M. Rashad ◽  
T. Salah ◽  
...  
Keyword(s):  
Heat Source ◽  
Free Convection ◽  
Heat Generation ◽  
Hybrid Nanofluid ◽  
Transfer Enhancement ◽  
Square Cavity ◽  
Conventional Models ◽  
Source Sink ◽  
Growing Strategy ◽  
Generation Parameter

In the field of heat transfer enhancement, there is a very new growing strategy to use hybrid nanofluid consisting of two or more nanoparticles dispersed in a base fluid. The current perusal introduces a numerical analysis to investigate the importance of hybrid nanofluid in the free convection inside a partially heated square cavity, and subjected to inclined magnetic field with heat generation/absorption. The horizontal walls are kept adiabatic. Numerical solution of mathematical model which describes the problem is achieved by finite difference method. The Conventional models of Brinkman and Maxwell were applied to assess the viscosity and thermal conductivity of the Cu-Al2O3-Water hybrid nanofluid. The considered problem was studied by varying some parameters such as the size and position of the heat source/sink, heat generation parameter, Hartmann number, and three combinations of nanoparticles volume fractions. The results show that the Nusselt number of hybrid nanofluid is higher than the Alumina-water nanofluid and less than the Copper-water nanofluid.

scholarly journals MHD mixed convection of localized heat source/sink in an Al2O3-Cu/water hybrid nanofluid in L-shaped cavity

2021 ◽  
Vol 60 (3) ◽  
pp. 2947-2962
Author(s):  
T. Armaghani ◽  
M.S. Sadeghi ◽  
A.M. Rashad ◽  
M.A. Mansour ◽  
Ali J. Chamkha ◽  
...  
Keyword(s):  
Heat Source ◽  
Mixed Convection ◽  
Hybrid Nanofluid ◽  
Source Sink

scholarly journals MHD and Slip Effect in Micropolar Hybrid Nanofluid and Heat Transfer over a Stretching Sheet with Thermal Radiation and Non-uniform Heat Source/Sink

CFD letters ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 121-130
Author(s):  
Nur Faizzati Ahmad Faizal ◽  
Norihan Md Ariffin ◽  
Yong Faezah Rahim ◽  
Mohd Ezad Hafidz Hafidzuddin ◽  
Nadihah Wahi
Keyword(s):  
Heat Transfer ◽  
Angular Velocity ◽  
Heat Source ◽  
Thermal Radiation ◽  
Stretching Sheet ◽  
Velocity Profiles ◽  
Hybrid Nanofluid ◽  
Temperature Profiles ◽  
Uniform Heat ◽  
Source Sink

In the presence of slips, non-uniform heat source/sink, thermal radiation and magnetohydrodynamic (MHD), micropolar hybrid nanofluid and heat transfer over a stretching sheet has been studied. The problem is modelled as a mathematical formulation that involves a system of the partial differential equation. The similarity approach is adopted, and self-similar ordinary differential equations are obtained and then those are solved numerically using the shooting method. The flow field is affected by the presence of physical parameters such as micropolar parameter, magnetic field parameter, suction parameter and slip parameter whereas the temperature field is affected by thermal radiation parameter, space-dependent parameter, temperature-dependent internal heat generation/absorption parameter, Prantl number and Biot number. The skin friction coefficient, couple stress and local Nusselt number are tabulated and analysed. The effects of the governing parameters on the velocity profiles, angular velocity profiles and temperature profiles are illustrated graphically. The results of velocity profiles, angular velocity profiles and temperature profiles are also obtained for several values of each parameters involved.

Magnetohydrodynamics Natural Convection in a Triangular Cavity Filled With a Cu-Al2O3/Water Hybrid Nanofluid With Localized Heating From Below and Internal Heat Generation

2018 ◽  
Vol 140 (7) ◽  
Author(s):  
A. M. Rashad ◽  
Ali J. Chamkha ◽  
Muneer A. Ismael ◽  
Taha Salah
Keyword(s):  
Natural Convection ◽  
Heat Generation ◽  
Volume Fraction ◽  
Internal Heat ◽  
Constant Heat Flux ◽  
Hybrid Nanofluid ◽  
Al2o3 Nanoparticles ◽  
Heater Element ◽  
Water Base ◽  
Generation Parameter

This study investigates the convective heat transfer of a hybrid nanofluid filled in a triangular cavity subjected to a constant magnetic field and heated by a constant heat flux element from below. The inclined side of the cavity is cooled isothermally while the remaining sides are thermally insulated. The finite difference method with the stream function-vorticity formulation of the governing equations has been utilized in the numerical solution. The problem is governed by several pertinent parameters namely, the size and position of the heater element, B = 0.2–0.8 and D = 0.3–0.7, respectively, the Rayleigh number, Ra = 102–106, the Hartmann number, Ha = 0–100, the volume fraction of the suspended nanoparticles, ϕ = 0–0.2, and the heat generation parameter Q = 0–6. The results show significant effect of increasing the volume fraction of the hybrid nanofluid when the natural convection is very small. Moreover, the hybrid nanofluid composed of equal quantities of Cu and Al2O3 nanoparticles dispersed in water base fluid has no significant enhancement on the mean Nusselt number compared with the regular nanofluid.

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