Natural convection heat transfer utilizing nanofluid in a cavity with a periodic side-wall temperature in the presence of a magnetic field

Hussam, Wisam K.; Khanafer, Khalil; Salem, Hayder; Sheard, Gregory J.

doi:10.1016/j.icheatmasstransfer.2019.02.018

Cited by 40 publications

(9 citation statements)

References 39 publications

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“…In the present study Mesh 4 corresponds to grid number 12,412 and is selected for the calculations. For the purpose of validation, the present model has been configured to the Hussam et al [32] model. The streamlines and isotherms are evaluated at one period of time with the following parameters: A = 0.5, f = 5, ϕ = 0.2, Ra = 10 6 , Ha = 100, as revealed in Figure 3.…”

Section: Grid Independent and Validationmentioning

confidence: 99%

“…It is clearly observed there is a precise agreement between the two studies, of the validity of the present model in studying the magnetohydrodynamic problems in square cavities. For the purpose of validation, the present model has been configured to the Hussam et al [32] model. The streamlines and isotherms are evaluated at one period of time with the following parameters: A = 0.5, f = 5, φ = 0.2, Ra = 10 6 , Ha = 100, as revealed in Figure 3.…”

Section: Grid Independent and Validationmentioning

confidence: 99%

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Numerical Investigation of a Rotating Magnetic Field Influence on Free Convective CNT/Water Nanofluid Flow within a Corrugated Enclosure

et al. 2022

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This paper emphasizes the effect of applying a rotating magnetic field on the natural convective flow of CNT/Water nanofluid inside a corrugated square cavity differentially heated through its sidewalls, while the upper and lower boundaries are supposed to be perfectly insulated. The aim of this study is to highlight the impact of a large variety of parameters, namely Hartman number, frequency of rotation, Rayleigh number, nanoparticles volume fraction, and corrugation aspect ratio on the flow behaviour and thermal transport characteristics. The governing non-linear coupled differential equations are solved by using the finite element technique. Outcomes indicated that the thermal energy exchange is improved with the Rayleigh number increment and nanoparticles loading, while it is weakened with the rising of Ha, ascribed to the Lorentz force opposition to buoyancy. Moreover, enlarging the corrugation aspect ratio causes the apparition of stagnant fluid zones and the rate of heat transfer is reduced as a result.

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Section: Grid Independent and Validationmentioning

confidence: 99%

Section: Grid Independent and Validationmentioning

confidence: 99%

Numerical Investigation of a Rotating Magnetic Field Influence on Free Convective CNT/Water Nanofluid Flow within a Corrugated Enclosure

et al. 2022

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“…Xu et al [33] presented isotherms and flow lines characteristics inside a cavity filled with copper-water type nanofluid and professed that the as values of Rayleigh number amplifies the values of Nusselt number deteriorates. Hussam et al [34] discussed electrically conducting nanofluid heat transfer characteristics inside a cavity numerically and noticed that heat transfer rate if highly effected by the volume fraction of nanoparticle parameter. Mohebbi et al [35] presented thermal lines and flow lines behavior of nanofluid inside a cavity with solid obstacle in the center numerically with implementing lattice Boltzmann method.…”

Section: Introductionmentioning

confidence: 99%

Flow and heat transfer analysis of carbon nanotubes based nanofluid flow inside a cavity with modified Fourier heat flux

Reddy¹,

Sreedevi²

2021

Phys. Scr.

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Impact of modified Fourier heat flux on flow and heat transfer characteristics of magnetic nanofluid inside a cavity packed with Ethylene Glycol − Multiwalled carbon nanotubes type nanofluid by taking thermal radiation into the account is numerically examined in this analysis. The cavity is filled with nanofluid made up of multi—walled carbon nanotubes as nanoparticle and Ethylene glycol as base fluid. Finite difference method is employed to solve the dimensionless partial differential equations represents energy and fluid flow equations of the present problem. Streamlines and Isotherms with different values of pertinent variables, such as, Magnetic parameter ( 0.1 ≤ M ≤ 0.3 ) , volume fraction parameter ( 0.01 ≤ ϕ ≤ 0.03 ) , Prandtl number ( 6.2 ≤ Pr ≤ 8.2 ) , thermal relaxation parameter ( 0.1 ≤ γ ≤ 0.3 ) , Rayleigh number ( 100 ≤ Ra ≤ 1000 ) and radiation number ( 0.01 ≤ R ≤ 0.03 ) are plotted through graphs. Average Nusselt number values are also calculated for several values of parameters and are also represented through plots. It is perceived from this investigation that the rates of heat transfer enriched from 4.8% to 12.6% when multi-walled carbon nanotubes of volume fraction 0.03 are added to the base fluid. Thermal relaxation parameter insentifies the rates of heat transfer of EG − MWCNTs type nanofluid inside the cavity.

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“…In the past several years, we had continued the studies using similar scaling analysis and numerical simulations to derive various scaling laws for the unsteady NCBL flow under the sinusoidal heat flux or temperature for Pr > 1 fluid and Pr < 1 fluid in both homogeneous and stratified ambient fluids. [28][29][30] There are also some other recent studies on the unsteady NCBL flow behavior subject to different timedependent sinusoidal temperature or heat flux for Newtonian and non-Newtonian fluids, such as References [31][32][33][34][35]. Zhao et al 17 studied the convective instability of NCBL flow during its transition to the turbulent regime by introducing time-dependent sinusoidal temperature perturbations.…”

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confidence: 99%

Scaling laws for natural convection boundary layer of a Pr > 1 fluid on a vertical solid surface subject to a sinusoidal heating flux in a linearly stratified ambient

2021

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The understanding of the transient behavior of the natural convection boundary layer on a heated vertical solid surface is crucial for numerous applications. In this study, scaling analysis is performed to derive the scaling laws for the major parameters that characterize the transient behavior of natural convection boundary layer of a Prandtl number larger than 1 fluid on a vertical solid surface subject to a sinusoidal heating flux in a linearly stratified ambient. It is found that the developed scaling laws are in good agreement with the direct numerical simulation results over wide ranges of Prandtl number, stratification parameter, and frequency of the sinusoidal heat flux.

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Natural convection heat transfer utilizing nanofluid in a cavity with a periodic side-wall temperature in the presence of a magnetic field

Cited by 40 publications

References 39 publications

Numerical Investigation of a Rotating Magnetic Field Influence on Free Convective CNT/Water Nanofluid Flow within a Corrugated Enclosure

Numerical Investigation of a Rotating Magnetic Field Influence on Free Convective CNT/Water Nanofluid Flow within a Corrugated Enclosure

Flow and heat transfer analysis of carbon nanotubes based nanofluid flow inside a cavity with modified Fourier heat flux

Scaling laws for natural convection boundary layer of a Pr > 1 fluid on a vertical solid surface subject to a sinusoidal heating flux in a linearly stratified ambient

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