Mixed convection nanofluid flows through a grooved channel with internal heat generating solid cylinders in the presence of an applied magnetic field

Job, Victor M.; Gunakala, Sreedhara Rao

doi:10.1016/j.ijheatmasstransfer.2016.11.021

Cited by 33 publications

(9 citation statements)

References 16 publications

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“…We assume that the inlet temperatures and the initial temperature are 300 K, while the temperatures of the upper and the lower hot walls are 310 K. Other walls are adiabatic; and the concentration at the inlet is φ. The thermo-physical properties of the water-Al 2 O 3 nanofluid are summarized in Table 2, where the reference temperature for k f 0 is 300 K. [36,75] 76.3 [78,79] For both geometries, a mesh dependency study is performed, but we only show the detail for the Y-type intersection channel. To consider the mesh dependency, we use = 0.0001, = 0, = 100.…”

Section: The Geometry and The Kinematics Of The Physical Problemsmentioning

confidence: 99%

Heat Transfer and Flow of Nanofluids in a Y-Type Intersection Channel with Multiple Pulsations: A Numerical Study

Massoudi

Yan

2017

Energies

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Abstract:In this paper, we study pulsed flow and heat transfer in water-Al 2 O 3 nanofluids in a Y-type intersection channel with two inlets and one outlet. At the two inlets, two sinusoidal velocities with a phase difference of π are applied. We assume that the shear viscosity and the thermal conductivity of the nanofluids depend on the nanoparticles concentration. The motion of the nanoparticles is modeled by a convention-diffusion equation, where the effects of the Brownian motion, thermophoretic diffusion, etc., are included. The effects of pulse frequency, pulse amplitude and nanoparticles concentration on the heat transfer are explored numerically at various Reynolds numbers. The results show that the application of the pulsed flow improves the heat transfer efficiency (Nusselt number) for most of the cases studied. Amongst the four factors considered, the effect of the frequency seems to be the most important.

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Section: The Geometry and The Kinematics Of The Physical Problemsmentioning

confidence: 99%

Heat Transfer and Flow of Nanofluids in a Y-Type Intersection Channel with Multiple Pulsations: A Numerical Study

Massoudi

Yan

2017

Energies

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“…Kumar et al [49] published an experimental analysis on turbulent free convection in a cavity with a smooth or grooved bottom area in the presence of heat fux. A numerical study on the mixed convective flow of nanoliquids in a grooved channel like solid cylinders with the efffect of magnetic field is carried out by Job and Gunakala [50]. They showed that the diverse groove geometries, cylinder radius and other related parameters influenced flow and thermal fields.…”

Section: Introductionmentioning

confidence: 99%

Convection Heat Transfer of MgO-Ag /Water Magneto-Hybrid Nanoliquid Flow into a Special Porous Enclosure

Mebarek‐Oudina

Redouane

Rajashekhar

2020

AJRESD

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This work explores numerically a computational study of free convection in a grooved porous enclosure filled with water-based hybrid-nanoliquid in the presence of an external magnetic field. To solve the governing equations of the problem, the Galerkin finite element technique is utilized. For a several governing parameters such as Rayleigh number (102≤Ra ≤106), magnetic field parameter (0≤Ha≤100), Darcy number (10-2≤ Da ≤10-4) the results are obtained and discussed via streamlines, isotherms and average Nusselt number. The magnetic field has a good regulating effect for the fluid flow and the heat transfer in porous media

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“…Kumar et al [37] performed an experimental study on turbulent free convection in a cavity having smooth or grooved bottom surface in the presence of heat flux, and they highlighted that temperature distributions fluctuated remarkably for grooved surface than smooth. Job and Gunakala [38] carried out a numerical study on mixed convective flow of nanofluids in a grooved channel including solid cylinders in the presence of magnetic field effect. Their results indicated that flow and thermal fields were affected by the different groove geometries, cylinder radius and other relevant parameters.…”

Section: Introductionmentioning

confidence: 99%

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

2020

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In this paper, a computational study of natural convection in a grooved enclosure filled with water-based nanofluid in the presence of external magnetic field is numerically investigated. Two-component non-homogeneous model is introduced to develop the governing partial differential equations. Galerkin finite element method is used to solve the governing equations. The computation is carried out for a wide range of governing parameters such as Rayleigh number (10 3 ≤ Ra ≤ 10 6), magnetic field parameter (10 ≤ Ha ≤ 100) and volume fraction of nanoparticles (0% ≤ ϕ ≤ 5%) with fixed values of remaining parameters. A detailed parametric analysis is performed to show the effects of physical parameters on the fluid flow and temperature distributions within the enclosure via streamlines, isotherms, isoconcentrations, midsectional velocities, average Nusselt number and temperature, respectively. In addition, the entropy generation and Bejan number are also computed and discussed elaborately. The results of the current study are compared to those of previous numerical and experimental studies and found to be in rational agreements. The results ascertain that the average Nusselt number and entropy generation increase with rising Rayleigh number and nanoparticle volume fraction, whereas they decrease with increasing magnetic field strength. Moreover, it is found that the appropriate combination of governing parameters can maximize the heat transfer rate and minimize the entropy generation as well.

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Mixed convection nanofluid flows through a grooved channel with internal heat generating solid cylinders in the presence of an applied magnetic field

Cited by 33 publications

References 16 publications

Heat Transfer and Flow of Nanofluids in a Y-Type Intersection Channel with Multiple Pulsations: A Numerical Study

Heat Transfer and Flow of Nanofluids in a Y-Type Intersection Channel with Multiple Pulsations: A Numerical Study

Convection Heat Transfer of MgO-Ag /Water Magneto-Hybrid Nanoliquid Flow into a Special Porous Enclosure

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

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