Cu-Al2O3 hybrid nanofluid natural convection in an inclined enclosure with wavy walls partially layered by porous medium

Kadhim, Hakim T.; Jabbar, Faris A.; Rona, Aldo

doi:10.1016/j.ijmecsci.2020.105889

Cited by 67 publications

(26 citation statements)

References 61 publications

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“…and it has gained significant attention owing to its industrial applications like thermal insulation engineering, heat pipes, filtration process and drying processes. In recent years, notable improvements in thermal efficiency (42%) have been accomplished (Alhajaj et al 2020;Cimpean et al 2020;Kadhim et al 2020;Moghadasi et al 2020).…”

Section: Heat Transfer Of Hybrid Nanofluids With Porous Mediamentioning

confidence: 99%

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Physical and Mathematical Modelling of Fluid and Heat Transport Phenomena in Porous Media

Anitha

Pichumani

Thomas

2021

Advanced Functional Porous Materials

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Heat transport finds use in several applications including heat exchangers, marine units, food processing units, oil and gas industries, petroleum industries and so on. By providing a large surface area and irregular motion in flow, made possible by porous media and enhances the thermal efficiency. The addition of a single type of nanosized particles in the base fluid gives rise to nanofluids. It tends to have higher thermal conductivity than the base fluid. However, currently hybrid nanofluids are introduced to overcome the disadvantages associated with nanofluids such as lower chemical stability, lower corrosion-resistant and so on. Hybrid nanofluids consist of dissimilar nanoparticles. Here, the heat transfer performance of nanofluids and hybrid nanofluids which flow through porous media is discussed. In addition, the role of the external magnetic field on the heat transfer performance of nanofluids with porous media is also explored. The relation between important parameters like Darcy number, porosity, Hartmann number, Reynolds number, Biot number and heat transfer performance of fluids with porous media is duly discussed. This chapter focuses on the role of porous media in enhancing heat transfer performance of nanofluids and hybrid nanofluids when flow occurs through different geometries.

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Section: Heat Transfer Of Hybrid Nanofluids With Porous Mediamentioning

confidence: 99%

“…Normal convection of HYNF flow in the enclosure which is layered by porous medium is numerically analysed, and it is shown in Fig. 16 (Kadhim et al 2020). In addition, at a different inclination angle of the porous media, the heat transfer has been analysed.…”

Section: Heat Transfer Of Hybrid Nanofluids With Porous Mediamentioning

confidence: 99%

Physical and Mathematical Modelling of Fluid and Heat Transport Phenomena in Porous Media

Anitha

Pichumani

Thomas

2021

Advanced Functional Porous Materials

View full text Add to dashboard Cite

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“…The enclosure was divided into two layers, one filled with Ag nanofluid and the other with porous media. The authors in Kadhim et al [ 29 ] presented a parametric numerical analysis of the free convection in a porous enclosure with wavy walls filled by a hybrid nanofluid, at several inclination angles. The authors in Alsabery et al [ 30 ] simulated the free convection heat transfer inside a porous cavity filled with water-based nanofluid with the consideration of the LTNE model.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Amplitude and Local Thermal Non-Equilibrium Design on Natural Convection within NanoflUid Superposed Wavy Porous Layers

et al. 2021

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A numerical study is presented for the thermo-free convection inside a cavity with vertical corrugated walls consisting of a solid part of fixed thickness, a part of porous media filled with a nanofluid, and a third part filled with a nanofluid. Alumina nanoparticle water-based nanofluid is used as a working fluid. The cavity’s wavy vertical surfaces are subjected to various temperature values, hot to the left and cold to the right. In order to generate a free-convective flow, the horizontal walls are kept adiabatic. For the porous medium, the Local Thermal Non-Equilibrium (LTNE) model is used. The method of solving the problem’s governing equations is the Galerkin weighted residual finite elements method. The results report the impact of the active parameters on the thermo-free convective flow and heat transfer features. The obtained results show that the high Darcy number and the porous media’s low modified thermal conductivity ratio have important roles for the local thermal non-equilibrium effects. The heat transfer rates through the nanofluid and solid phases are found to be better for high values of the undulation amplitude, the Darcy number, and the volume fraction of the nanofluid, while a limit in the increase of heat transfer rate through the solid phase with the modified thermal ratio is found, particularly for high values of porosity. Furthermore, as the porosity rises, the nanofluid and solid phases’ heat transfer rates decline for low Darcy numbers and increase for high Darcy numbers.

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“…Following the same numerical procedure, Sheikholeslami et al 44 conducted an investigation in a circular enclosure exposed to an external magnetic field and analyzed the heat transfer performance considering MWCNT–Fe 3 O 4 /H 2 O hybrid nanofluid. Several other numerical and experimental investigations are also available in the literature analyzing the heat transfer performance of various hybrid nanofluids 45–50 …”

Section: Introductionmentioning

confidence: 99%

A numerical comparison among different water‐based hybrid nanofluids on their influences on natural convection heat transfer in a triangular solar collector for different tilt angles

et al. 2021

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Natural convection inside a triangular solar collector is investigated numerically for different nanofluids and hybrid nanofluids in this study. The individual effects of Al2O3–water, carbon nanotubes (CNT)–water, and Cu–water nanofluids are observed for different solid volume fractions of nanoparticles (0%–10%). Three types of hybrid nanofluids are prepared using different ratios of Al2O3, CNT, and Cu nanoparticles in water. A comparison is made varying the Rayleigh numbers within laminar range (103–106) for different tilt angles (0°, 30°, 60°, and 90°) of the solar collector. The inclined surface of the triangular solar collector is isothermally cold and the bottom wall (absorber plate) is isothermally hot, whereas the vertical wall with respect to the absorber plate is considered adiabatic. Average Nusselt numbers along the hot wall for different parameters are observed. Streamlines and isotherm contours are also plotted for different cases. Dimensionless governing Navier–Stokes and thermal energy conservation equations are solved by Galerkin weighted residual finite element method. Better convective heat transfer is found for higher Rayleigh number, solid volume fraction, and tilt angle. In the case of hybrid nanofluid, increasing the percentage of the nanoparticle that gives better heat transfer performance individually results in enhancing natural convection heat transfer inside the enclosure.

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Cu-Al2O3 hybrid nanofluid natural convection in an inclined enclosure with wavy walls partially layered by porous medium

Cited by 67 publications

References 61 publications

Physical and Mathematical Modelling of Fluid and Heat Transport Phenomena in Porous Media

Physical and Mathematical Modelling of Fluid and Heat Transport Phenomena in Porous Media

Impacts of Amplitude and Local Thermal Non-Equilibrium Design on Natural Convection within NanoflUid Superposed Wavy Porous Layers

A numerical comparison among different water‐based hybrid nanofluids on their influences on natural convection heat transfer in a triangular solar collector for different tilt angles

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