MHD natural convection and entropy generation in a grooved enclosure filled with nanofluid using two-component non-homogeneous model

Ali, Mohammad Mokaddes; Akhter, Rowsanara; Alim, Md. Abdul

doi:10.1007/s42452-020-2319-x

Cited by 10 publications

(3 citation statements)

References 53 publications

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“…Finally, these linear equations are solved by employing the triangular factorization method and reduced integration method expressed by Zeinkiewicz et al [55]. Te convergence criterion of the numerical solution along with error estimation has been set to |φ m+1 − φ m | ≤ 10 − 5 , where m is the number of iteration and φ is a function of U, V, and θ. Te details of the computational procedure are also available in the earlier studies [32,56,57], which are well described in [58,59]. Te simple algorithm of this study is exposed through the following fowchart (in Figure 2):…”

Section: Evaluation Of Average Nusselt Number Te Local Nusseltmentioning

confidence: 99%

Magnetic-Mixed Convection in Nanofluid-Filled Cavity Containing Baffles and Rotating Hollow-Cylinders with Roughness Components

Ali

Akhter

Alim

et al. 2022

Mathematical Problems in Engineering

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Mixed convective heat transfer in a nanofluid-filled lid-driven square cavity equipped with a rotating cylinder, horizontal baffles, and an external magnetic field is numerically examined in this study. A cylinder with triangular components is set at the centre of the cavity while two horizontal baffles are fixed to its vertical walls. The cavity is under the impact of the external magnetic field. Modified Maxwell’s model is taken into consideration to estimate the thermal conductivity of nanofluids. Galerkin FEM is applied to simulate nondimensional governing equations. The computations are carried out for specific ranges of physical parameters, and the results are illustrated through streamlines, isotherms, and average Nusselt number bar charts. Contours plotting indicate that flow circulation and distribution of temperature are significantly affected by the speed of a rotating rough cylinder. The fluid velocity remarkably increases with an increase in speed ratio and Reynolds number but it declines with Hartmann number, baffle length, and volume fraction. Heat transfer rate is substantially augmented by increasing the rotational speed of the rough cylinder, heights of triangular components, and suspended-nanoparticles which are also optimized for increasing baffle’s length and its horizontal arrangement. The findings of this investigation can be applied to improve the cooling efficiency of engineering equipment such as heat exchangers, energy storage systems, electronic equipment, solar collectors, and nuclear reactor safety devices.

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Section: Evaluation Of Average Nusselt Number Te Local Nusseltmentioning

confidence: 99%

Magnetic-Mixed Convection in Nanofluid-Filled Cavity Containing Baffles and Rotating Hollow-Cylinders with Roughness Components

Ali

Akhter

Alim

et al. 2022

Mathematical Problems in Engineering

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“…Electrical and magnetic fields have an effect 181 on such fluids. MHD natural convection in the presence of an external magnetic field with waterbased nanofluid was studied by Ali et al, [24]. Here, the author develops the governing partial differential equations with a two-component non-homogeneous model and applied Galerkin finite element method to obtain the solution of the models.…”

Section: Introductionmentioning

confidence: 99%

Using Micropolar Nanofluid under a Magnetic Field to Enhance Natural Convective Heat Transfer around a Spherical Body

Yaseen¹,

Alwawi

Swalmeh³

et al. 2022

ARFMTS

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An analysis is discussed of the heat and mass transfer for micropolar nanofluid in presence of natural convection from a spherical body with magneto-hydrodynamic (MHD) effects. The constant wall temperature boundary condition is also studied. By employing proper similarity transformations, the governing equations are converted into a set of partial differential equations (PDEs) with the used boundary conditions, which can then be solved numerically via the efficient Keller-box implicit numerical finite difference method. The numerical results of impacts of the controlling parameters on heat transfer physical quantities have been presented, tabular and graphically, by MATLAB symbolic software. Comparisons of the current study results to previously published results show good agreement, indicating that our numerical computations are legitimate and accurate. Increasing nanoparticle volume fraction is observed to depress local skin friction, Nusselt number, and angular velocity while the reverse effects are observed for velocity and temperature.

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“…GOE is a measure of irreversibility and energy loss in the system. Accordingly, in addition to HTR, GOE has also been investigated in numerous studies [39][40][41][42][43][44][45]. Zhou et al [46] studied HTR and GOE in a nanofluid-filled cavity at a Grashof number (Ga) of 10 4 -10 6 and a nanoparticle volume fraction of 0.01-0.15%.…”

Section: Introductionmentioning

confidence: 99%

Effect of Straight, Inclined and Curved Fins on Natural Convection and Entropy Generation of a Nanofluid in a Square Cavity Influenced by a Magnetic Field

et al. 2021

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In this paper, the free convective heat transfer of nanofluids in a square cavity is simulated using a numerical method. The angle of the cavity could be changed in the horizontal axis from 0 to 90 degrees. The cavity is exposed under a constant magnetic field. Two opposite walls of the cavity are cold and warm, and the rest of the walls are insulated. On the hot wall, there are two fins with the same wall temperature. The equations were discretized by the finite volume method (FVM) and then solved using the SIMPLE algorithm. Three different fin configurations (straight, inclined and curved) were studied in terms of heat transfer rate and generation of entropy. According to the simulation results, the heat transfer rate was improved by tilting the fins toward the top or bottom of the cavity. At Ra = 105 and Ha = 20, the maximum heat transfer rate was achieved at a cavity inclination of 90° and 45°, respectively, for straight and curved fins. In the horizontal cavity, heat transfer rate could be improved up to 6.4% by tilting the fins and up to 4.9% by warping them. Increasing the Hartmann number from 0 to 40 reduced the Nusselt number and entropy generation by 37.9% and 33.8%, respectively.

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MHD natural convection and entropy generation in a grooved enclosure filled with nanofluid using two-component non-homogeneous model

Cited by 10 publications

References 53 publications

Magnetic-Mixed Convection in Nanofluid-Filled Cavity Containing Baffles and Rotating Hollow-Cylinders with Roughness Components

Magnetic-Mixed Convection in Nanofluid-Filled Cavity Containing Baffles and Rotating Hollow-Cylinders with Roughness Components

Using Micropolar Nanofluid under a Magnetic Field to Enhance Natural Convective Heat Transfer around a Spherical Body

Effect of Straight, Inclined and Curved Fins on Natural Convection and Entropy Generation of a Nanofluid in a Square Cavity Influenced by a Magnetic Field

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