Numerical investigation of conjugate natural convection heat transfer in a square porous cavity heated partially from left sidewall

Al‐Farhany, Khaled; Abdulkadhim, Ammar

doi:10.18280/ijht.360132

Cited by 23 publications

(20 citation statements)

References 11 publications

(11 reference statements)

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“…The governing equations with the boundary conditions are resolved numerically by the using COMSOL Metaphysics. The incompressible Navier-Stokes application mode (ns), the convection-conduction application mode (cc), and the diffusion application mode (di) are used F I G U R E 2 Mesh of the present study, N = 3 for Equations (2,(4)(5)(6)15). P2-P1 Lagrange elements and the Galerkin least-square method are used to ensure stability.…”

Section: Computational Methodologymentioning

confidence: 99%

“…The boundary conditions for Equations (2,(4)(5)(6)15) are given by U ; V = 0 = 0, Ψ = 0, θ = 1, on the inner corrugation wall cylinder…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…This is because of its wide range of engineering applications, such as insulation of aircrafts, electronic equipment cooling, control of heating, and ventilation systems in the design of buildings, nuclear reactors, solar collectors, and so on. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] The effect of hybrid nanofluids on the process of melting of nanoenhanced phase change materials within enclosures has been studied by Chamkha et al 16 Ghalambaz et al 17 Mixed convection of simple designs like square, rectangular, and triangular shapes located inside a square enclosure filled with various types of nanofluids has been studied extensively by many researchers. [18][19][20][21][22][23][24][25][26][27][28] However, in various engineering applications, the geometrical shapes of enclosures are more complicated more than simple enclosures.…”

Section: Introductionmentioning

confidence: 99%

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Numerical study of mixed convection nanofluid in an annulus enclosure between outer rotating cylinder and inner corrugation cylinder

Ali

Hamzah

Abdulkadhim³

2018

Heat Trans. Asian Res.

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Numerical investigations are presented for mixed convection problems in a concentric inner sinusoidal cylinder and an outer rotating circular cylinder, which were kept at constant hot and cold temperatures, respectively. The free space between the cylinders and the enclosure walls was filled with a water‐Cu nanofluid. The governing equations are formulated for velocity, pressure, and temperature formulation and are modeled in COMSOL5.2a, a partial differential equation solver based on the Galerkin finite element method. The governing parameters considered are the solid volume fraction, [0, 0.02, 0.04, and 0.06], Re (1, 25, 100, 200, and 300), and Ra (less than 104), and the inner cylinder corrugation frequencies varied from (N = 3, 6, and 9). According to the calculations, the Reynolds number, the Rayleigh number, the nanoparticle volume fraction, and the number of corrugations play an important role of forming the stream and isothermal lines, the local and the average Nusselt number inside the annulus enclosure. The average Nusselt number decreases with increasing Reynolds number and the number of corrugations, while it increases as the Rayleigh number and the volume fraction increase.

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Section: Computational Methodologymentioning

confidence: 99%

“…The boundary conditions for Equations (2,(4)(5)(6)15) are given by U ; V = 0 = 0, Ψ = 0, θ = 1, on the inner corrugation wall cylinder…”

Section: Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical study of mixed convection nanofluid in an annulus enclosure between outer rotating cylinder and inner corrugation cylinder

Ali

Hamzah

Abdulkadhim³

2018

Heat Trans. Asian Res.

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“…The dimensionless governing Equations (14)(15)(16)(17)(18)(19) are solved numerically utilizing the finite volume scheme with the specified boundary conditions. The SIMPLE algorithm is applied to combine the momentum and continuity equations.…”

Section: Solution Proceduresmentioning

confidence: 99%

Natural convection in a triangular cavity filled with air under the effect of external air stream cooling

Saleem

Alshara

2019

Heat Trans. Asian Res.

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Natural convection in a triangular cavity filled with air is investigated numerically. In this paper, the cavity is exposed to air stream cooling exerted on its sides and it is heated by a fixed heat flux from the base. The air inside the cavity is assumed to be laminar and obeying Boussinesq approximation. The governing equations are solved numerically using the finite volume technique with SIMPLE algorithm. The results are achieved with a range of Rayleigh number (104 < Ra < 107), free stream Reynolds number (103 < Re∞ < 1.5 × 104), four aspect ratios (AR = 0.25, 0.5, 0.866, and 1) and five inclination angles (ϕ = 0°, 30°, 45°, 60°, 90°). The influence of these parameters is displayed on the stream function, isotherms lines, local and average Nusselt numbers. The results reveal that the heat transfer rate increases as Rayleigh number, free stream Reynolds number and AR increase. The highest heat transfer rate is obtained at ϕ = 0° while the lowest one is obtained at ϕ = 90°. Furthermore, as the AR augments, the local and average Nusselt numbers are enhanced and the stream function is formed of two symmetric counter‐rotating vortices.

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“…They observed that heat transfer temperature distribution and fluid flow are affected by changing the radius of the partition with the maximum heat transfer. Farhany and Abdulkadhim [33] performed a numerical simulation on conjugate natural convection heat transfer in a porous enclosure with partially heated wall. They found that heat transfer can be enhanced by increasing the Rayleigh number.…”

Section: Introductionmentioning

confidence: 99%

Effect of conjugate heat transfer on flow of nanofluid in a rectangular enclosure

Zahan¹,

Alim²

2018

IJHT

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An elaborate numerical study of developing a model regarding conjugate effect of fluid flow and heat transfer in a heat conducting vertical walled cavity filled with copper-water nanofluid has been presented in this paper. This model is mainly adopted for a cooling of electronic device and to control the fluid flow and heat transfer mechanism in an enclosure. The numerical results have been provided in graphical form showing effect of various relevant nondimensional parameters. The relevant governing equations have been solved by using finite element method of Galerkin weighted residual approach. The analysis uses a two dimensional rectangular enclosure under conjugate convective conductive heat transfer conditions. The enclosure exposed to a constant and uniform heat flux at the left vertical thick wall generating a natural convection flow. The thicknesses of the remaining parts of the walls are assumed to be zero. The right wall is kept at a low constant temperature, while the horizontal walls are assumed to be adiabatic. A moveable divider is attached at the bottom wall of the cavity. The governing equations are derived for the conceptual model in the Cartesian coordinate system. The study has been carried out for the Rayleigh number Ra =10 6 and for the solid volume fraction 0 ≤ ϕ ≤ 0.05. The investigation is to be arrived out at different non-dimensional governing parameters. The effect of convective heat transfer coefficient, divider position and thickness of solid wall on the hydrodynamic and thermal characteristic of flow has been analyzed. Results are to be presented in terms of streamlines, isotherms and average Nusselt number of the nanofluid for different values of governing parameters.

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Numerical investigation of conjugate natural convection heat transfer in a square porous cavity heated partially from left sidewall

Cited by 23 publications

References 11 publications

Numerical study of mixed convection nanofluid in an annulus enclosure between outer rotating cylinder and inner corrugation cylinder

Numerical study of mixed convection nanofluid in an annulus enclosure between outer rotating cylinder and inner corrugation cylinder

Natural convection in a triangular cavity filled with air under the effect of external air stream cooling

Effect of conjugate heat transfer on flow of nanofluid in a rectangular enclosure

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