Magnetohydrodynamic double diffusive natural convection in trapezoidal cavities

Teamah, Mohamed A.; Shehata, Ali I.

doi:10.1016/j.aej.2016.02.033

Cited by 52 publications

(16 citation statements)

References 35 publications

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“…Since the left‐side wall is held at a constant temperature and the right‐side wall is cooled, there is more power in the fluid circulation near the right‐side wall than in the circulation near the left side. Figure 4 shows that while the angle of inclination increases, the force of circulation increases 38 and decreases marginally due to gravity on the left side contours and the right side contours. The respective velocity field is given in Figure 5.…”

Section: Resultsmentioning

confidence: 99%

“…An investigation on the impacts of magnetic filed in convection in an enclosure reveals that it increases the flow strength, and the heat transfer conduction mode is more prevalent than higher magnetic field convection. 38 Several contributions have focused on the case of convection of nanofluid [39][40][41][42][43][44][45] and hybrid nanofluid convection, 46 where the thermophysical properties of the base fluid are changed in the presence of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Cross flow on transient double‐diffusive natural convection in inclined porous trapezoidal enclosures

et al. 2020

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This paper investigates the cross-diffusion effects subject to exponential variable boundary conditions on transient double-diffusive natural convection flow in an enclosure. The flow domain is a two-dimensional inclined trapezoidal cavity filled with a porous medium. The top wall is assumed to be insulated and permeable, while the enclosure's bottom wall is subject to exponential varying temperature and concentration. The prescribed temperature and concentration are different at the vertical walls. Conservation equations are used as the governing equations. The finite element Galerkin weighted residual method, in association with the Newton-Raphson scheme is employed to solve the system of coupled nondimensional equations. The numerical tests are confirmed with existing literature and are found to be in excellent agreement. The simulations results for stream functions, isotherms, and isoconcentrations are discussed for the various flow parameters. A sensitivity analysis using the response surface method suggests that the average Nusselt and Sherwood numbers are more sensitive to the cross-diffusion effects. It is further observed that the cross-diffusion terms stabilize the sensitivity to the angle of inclination.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cross flow on transient double‐diffusive natural convection in inclined porous trapezoidal enclosures

et al. 2020

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“…Convergence is obtained when the maximum residuals of mass, momentum, energy, and diffusion equations of the grid control volume are smaller than 10 −5 . Figure 2 provides a comparison of the results of average Nusselt and Sherwood numbers obtained from our numerical code and the results of Teamah and Shehata (2016) for (Pr = 0.7, Le = 2 and N=1) in a trapezoidal cavity with an angle equal to 30°. The comparison showed an excellent match between the two results, with a difference of less than 0.8% for all Grashof number values.…”

Section: Numerical Code Validationmentioning

confidence: 99%

Double-diffusive natural convection in a trapezoidal solar pond with discrete heat boundary conditions: Effects on non-convective zones

Almeshaal¹

2021

JTST

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“…Their results revealed that when Rayleigh number is lowered, the mean Nusselt number lowers with augmenting the inclination angle at most volume fractions. Teamah and Shehata numerically simulated the effects of a magnetic field on double diffusive natural convection in a trapezoidal enclosure. They noted that heat and mass exchange reduced as the inclination angle augments.…”

Section: Introductionmentioning

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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Magnetohydrodynamic double diffusive natural convection in trapezoidal cavities

Cited by 52 publications

References 35 publications

Cross flow on transient double‐diffusive natural convection in inclined porous trapezoidal enclosures

Cross flow on transient double‐diffusive natural convection in inclined porous trapezoidal enclosures

Double-diffusive natural convection in a trapezoidal solar pond with discrete heat boundary conditions: Effects on non-convective zones

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

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