Analysis of Natural Convection Flow in a Trapezoidal Cavity Containing a Rectangular Heated Body in Presence of External Oriented Magnetic Field

Akter, Afroza; Parvin, Salma

doi:10.3329/jsr.v10i1.33848

Cited by 6 publications

(3 citation statements)

References 16 publications

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“…Tighchi et al [172] did similar research using LBM. Akter and Parvin [47] examined the MHD flow of air using the finite element method (FEM). Increasing Ra and decreasing Ha would enhance Nu.…”

Section: [ 888 ]mentioning

confidence: 99%

A Review on the Control Parameters of Natural Convection in Different Shaped Cavities with and without Nanofluid

et al. 2020

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Natural convection in cavities is an interesting subject for many researchers. Especially, in recent years, the number of articles written in this regard has grown enormously. This work provides a review of recent natural convection studies. At first, experimental studies were reviewed and, then, numerical studies were examined. Then, the articles were classified based on effective parameters. In each section, numerical studies were examined the parameters added to the cavity such as magnetic forces, fin, porous media and cavity angles. Moreover, studies on non-rectangular cavities were investigated. Free convection in enclosures depends more on the fluid velocity relative to the forced convection, leading to the opposite effect of some parameters that should essentially enhance rate of heat transfer. Nanoparticle addition, magnetic fields, fins, and porous media may increase forced convection. However, they can reduce free convection due to the reduction in fluid velocity. Thus, these parameters need more precision and sometimes need the optimization of effective parameters.

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Section: [ 888 ]mentioning

confidence: 99%

A Review on the Control Parameters of Natural Convection in Different Shaped Cavities with and without Nanofluid

et al. 2020

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“…In some of these papers, the MF has different angles, and the impact of the MF angle has been investigated. Akter et al 50 considered the NCHT of air inside an asymmetric cavity. They subjected the cavity to a constant MF.…”

Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann-based numerical analysis of nanofluid natural convection in an inclined cavity subject to multiphysics fields

Ibrahim

Berrouk

Saeed

et al. 2022

Sci Rep

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This research conducts a study of natural convection heat transfer (NCHT) in a nanofluid under a magnetic field (MF). The nanofluid is in a cavity inclined at an angle of 45°. The MF can take different angles between 0° and 90°. Radiative heat transfer is present in the cavity in volumetric form. There are two hot semicircles, similar to two half-pipes, on the bottom wall. The top wall is kept cold. The side walls and parts of the bottom wall, except the pipes, have been insulated. The lattice Boltzmann method has been used for the simulation. The studied parameters are the Rayleigh number (in the range 103–106), magnetic field angle, radiation parameter (in the range 0–2), and nanoparticle volume fraction (in the range 0–5%). The generated entropy has been studied as the NCHT. The results indicate that adding nanoparticles improves heat transfer rate (HTR). Moreover, the addition of volumetric radiation to the cavity enhances the Nusselt number by 54% and the generated entropy by 12.5%. With an augmentation in the MF angle from 0° to 90°, HTR decreases and this decrease is observed mostly at higher Rayleigh numbers. An augmentation in the Ra increases NCHT and entropy generation. Indeed, a rise in the Ra from 103 to 106 increases HTR by almost sixfold.

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“…They discovered that the heat transfer augmentation rate depends on the positioning of the source of heat. Akter and Pervin [27] analyzed convective heat flow in a trapezoid housing a centrally placed rectangular block. They upheld that the rate at which heat is augmented depends on Rayleigh and Hartmann numbers, and fluid type.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Natural Convection in a Concentric Trapezoidal Enclosure Filled with a Porous Medium

Olayemi

Isiaka

Al‐Farhany

et al. 2022

JERA

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Numerical study of natural convection around a heated trapezoidal block of different sizes located centrically in a larger trapezium has been investigated. The annulus between the trapeziums is filled with porous media. The sides of the inner trapezium are heated to a fixed temperature (T_h), and the slanted walls of the outer trapezium are adiabatic while its upper and lower walls are heated to temperatures of 〖T_c+(T_h-T_c)sin〗⁡(πx⁄L) and 〖T_h+(T_h-T_c)sin〗⁡(πx⁄L) respectively. The finite element numerical approach was used to solve the relevant dimensionless equations. Results are gotten for salient parameters including; modified Rayleigh number (10≤Ra_m≤ 1000), Darcy number (10^(-5)≤Da≤ 10^(-2)), and area ratio (1/5≤AR≤ 1/3). The results of this study are shown as isothermal contours, stream functions, and average Nusselt number. The results show that increasing Ra_m improves heat transfer; however, the response of thermal characteristics to AR increment depends on the range of Darcy number considered. Results from this study find application in ingot treatments and microchannel cooling among others.

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Analysis of Natural Convection Flow in a Trapezoidal Cavity Containing a Rectangular Heated Body in Presence of External Oriented Magnetic Field

Cited by 6 publications

References 16 publications

A Review on the Control Parameters of Natural Convection in Different Shaped Cavities with and without Nanofluid

A Review on the Control Parameters of Natural Convection in Different Shaped Cavities with and without Nanofluid

Lattice Boltzmann-based numerical analysis of nanofluid natural convection in an inclined cavity subject to multiphysics fields

Numerical Analysis of Natural Convection in a Concentric Trapezoidal Enclosure Filled with a Porous Medium

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