Non-Newtonian nanofluid natural convective heat transfer in an inclined Half-annulus porous enclosure using FEM

Abderrahmane, Aissa; Hatami, M.; Medebber, Mohamed Amine; Haroun, Sahraoui; Ahmed, Sameh E.; Sahnoun, M.

doi:10.1016/j.aej.2021.11.004

Cited by 42 publications

(12 citation statements)

References 38 publications

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“…Nanofluids are fluids containing nano-sized particles in the base fluid-like substance such as oils, polymer solutions, biofluids, water, and lubricants. Nanofluids have recently been exposed by Choi and Eastman [ 1 ], Slimani et al [ 2 ], Medebber et al [ 3 ], Bendrer et al [ 4 ], Zadeh et al [ 5 ], and Aissa et al [ 6 ] as a liquid substance capable to revolutionary heat transfer in several technical and industrial applications, such as domestic freezers, fuel cells, industrial mechanical processes, energy storage systems, and atomic reactors. Recently, Sahmeh et al [ 7 ], Hussain et al [ 8 ], and Muhammad et al [ 9 ] used aqueous solutions to study various types of nanoparticles.…”

Section: Background Informationmentioning

confidence: 99%

Darcy-Forchheimer Flow of Water Conveying Multi-Walled Carbon Nanoparticles through a Vertical Cleveland Z-Staggered Cavity Subject to Entropy Generation

et al. 2022

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To date, when considering the dynamics of water conveying multi-walled carbon nanoparticles (MWCNT) through a vertical Cleveland Z-staggered cavity where entropy generation plays a significant role, nothing is known about the increasing Reynold number, Hartmann number, and Darcy number when constant conduction occurs at both sides, but at different temperatures. The system-governing equations were solved using suitable models and the Galerkin Finite Element Method (GFEM). Based on the outcome of the simulation, it is worth noting that increasing the Reynold number causes the inertial force to be enhanced. The velocity of incompressible Darcy-Forchheimer flow at the middle vertical Cleveland Z-staggered cavity declines with a higher Reynold number. Enhancement in the Hartman number causes the velocity at the center of the vertical Cleveland Z-staggered cavity to be reduced due to the associated Lorentz force, which is absent when Ha = 0 and highly significant when Ha = 30. As the Reynold number grows, the Bejan number declines at various levels of the Hartmann number, but increases at multiple levels of the Darcy number.

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Section: Background Informationmentioning

confidence: 99%

Darcy-Forchheimer Flow of Water Conveying Multi-Walled Carbon Nanoparticles through a Vertical Cleveland Z-Staggered Cavity Subject to Entropy Generation

et al. 2022

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“…Free convective flow phenomena in porous matrix occurs in several systems and in nature, including geophysical, environmental and technological problems. Such problems in annular geometry are of great interest and their comprehensive studies are recorded in literature (Prasad and Kulacki, 1984;Keyhani et al, 1986;Rao et al, 1996;Shivakumara et al, 2002;Sankar et al, 2011Sankar et al, , 2012Sankar et al, , 2013Jha and Yusuf, 2016;Tayebi and Chamkha, 2021;Swamy et al, 2022;Abderrahmane et al, 2022). Prasad and Kulacki (1984) made a pioneering investigation on the convective thermal transport in an annulus containing porous media.…”

Section: Buoyant Heat Transfermentioning

confidence: 99%

“…Numerical investigation on natural convection and entropy generation in a vertical porous annulus has been investigated in detail by considering the influence of cavity inclination angle (Swamy et al , 2022). In a non-Newtonian nanoliquid saturated half-annular geometry, the impact of magnetic field and cavity inclination angle has been studied by using the finite element method (Abderrahmane et al , 2022).…”

Section: Introductionmentioning

confidence: 99%

Buoyant heat transfer of nanofluids in a vertical porous annulus: a comparative study of different models

Reddy

Sankar

2022

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Purpose This study aims to numerically study the buoyant convective flow of two different nanofluids in a porous annular domain. A uniformly heated inner cylinder, cooled outer cylindrical boundary and adiabatic horizontal surfaces are considered because of many industrial applications of this geometry. The analysis also addresses the comparative study of different porous media models governing fluid flow and heat transport. Design/methodology/approach The finite difference method has been used in the current simulation work to obtain the numerical solution of coupled partial differential equations. In particular, the alternating direction implicit method is used for solving transient equations, and the successive line over relaxation iterative method is used to solve time-independent equation by choosing an optimum value for relaxation parameter. Simpson’s rule is adopted to estimate average Nusselt number involving numerical integration. Various grid sensitivity checks have been performed to assess the sufficiency of grid size to obtain accurate results. In this analysis, a general porous media model has been considered, and a comparative study between three different models has been investigated. Findings Numerical simulations are performed for different combinations of the control parameters and interesting results are obtained. It has been found that the an increase in Darcy and Rayleigh numbers enhances the thermal transport rate and strengthens the nanofluid movement in porous annulus. Also, higher flow circulation rate and thermal transport has been detected for Darcy model as compared to non-Darcy models. Thermal mixing could be enhanced by considering a non-Darcy model. Research limitations/implications The present results could be effectively used in many practical applications under the limiting conditions of two-dimensionality and axi-symmetry conditions. The only drawback of the current study is it does not include the three-dimensional effects. Practical implications The results could be used as a first-hand information for the design of any thermal systems. This will help the design engineer to have fewer trial-and-run cases for the new design. Originality/value A pioneering numerical investigation on the buoyant convective flow of two different nanofluids in an annular porous domain has been carried out by using a general Darcy–Brinkman–Forchheimer model to govern fluid flow in porous matrix. The results obtained from current investigation are novel and original, with numerous practical applications of nanofluid saturated porous annular enclosure in the modern industry.

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“…In the present study, the thermophysical properties of the hybrid nanofluid [ 36 , 37 , 38 , 39 ] are considered as follow: Dynamic viscosity:

; Density:

; Specific heat:

; Thermal expansion coefficient:

, …”

Section: Mathematical Model and The Study Configurationmentioning

confidence: 99%

Irreversibility Interpretation and MHD Mixed Convection of Hybrid Nanofluids in a 3D Heated Lid-Driven Chamber

et al. 2022

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This paper presents a numerical simulation of a magneto-convection flow in a 3D chamber. The room has a very specific permeability and a zigzag bottom wall. The fluid used in this study is Al2O3-Cu/water with 4% nanoparticles. The Galerkin finite element technique (GFEM) was developed to solve the main partial equations. The hybrid nanofluid inside the container is subjected to the horizontal motion of the upper wall, an external magnetic field, and a thermal buoyancy force. The present numerical methodology is validated by previous data. The goal of this investigation was to understand and determine the percentage of heat energy transferred between the nanofluid and the bottom wall of the container under the influence of a set of criteria, namely: the movement speed of the upper wall of the cavity (Re = 1 to 500), the amount of permeability (Da = 10−5 to 10−2), the intensity of the external magnetic field (Ha = 0 to 100), the number of zigzags of the lower wall (N = 1 to 4), and the value of thermal buoyancy when the force is constant (Gr = 1000). The contours of the total entropy generation, isotherm, and streamline are represented in order to explain the fluid motion and thermal pattern. It was found that the heat transfer is significant when (N = 4), where the natural convection is dominant and (N = 2), and the forced convection is predominant.

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Non-Newtonian nanofluid natural convective heat transfer in an inclined Half-annulus porous enclosure using FEM

Cited by 42 publications

References 38 publications

Darcy-Forchheimer Flow of Water Conveying Multi-Walled Carbon Nanoparticles through a Vertical Cleveland Z-Staggered Cavity Subject to Entropy Generation

Darcy-Forchheimer Flow of Water Conveying Multi-Walled Carbon Nanoparticles through a Vertical Cleveland Z-Staggered Cavity Subject to Entropy Generation

Buoyant heat transfer of nanofluids in a vertical porous annulus: a comparative study of different models

Irreversibility Interpretation and MHD Mixed Convection of Hybrid Nanofluids in a 3D Heated Lid-Driven Chamber

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