Nanoparticle shape effect on the natural-convection heat transfer of hybrid nanofluid inside a U-shaped enclosure

Asmadi, M. S.; Siri, Zailan; Kasmani, R. Md.; Saleh, Habibis

doi:10.2298/tsci200818139a

Cited by 13 publications

(5 citation statements)

References 19 publications

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“…They are generally synthesized, and they mostly use metal oxides nanoparticles include Iron oxide , Aluminum oxide , Titanium oxide , Cerium oxide , Magnetite , Silicon dioxide , and Zinc oxide . These nanoparticles derive their exceptional physical-chemical properties from their smaller size, as well as their higher corner density or the sites of edge surface [53].…”

Section: B) Metallic Oxides Nanoparticlesmentioning

confidence: 99%

Thermodynamic study of the effects of nanoparticles on thermal origin: A review

Wahhab

Ghorbani

2023

THERM SCI

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According to ISO and ASTM specifications, nanoparticles are described as the particles with a size in the range of 1-100 with one or more dimensions, being the base of nanotechnology. In this study, a comprehensive review on the thermodynamic effects of nanoparticles on thermal origin is carried out. Firstly, the classification of nanoparticles, which includes organic, inorganic and carbon-based nanoparticles are introduced. Then, various applications of nanoparticles in many fields including cosmetics, sunscreens, electronics, catalysis, mechanics, manufacturing, materials, environment and energy harvesting are briefly highlighted. A comprehensive review on the recent research trends on the impacts of nanoparticles on thermal origin is collected and summarized. Afterwards, the physical, chemical, and thermal properties of nanoparticles are highlighted. In the end, a conclusion is withdrawn.

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Section: B) Metallic Oxides Nanoparticlesmentioning

confidence: 99%

Thermodynamic study of the effects of nanoparticles on thermal origin: A review

Wahhab

Ghorbani

2023

THERM SCI

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“…Numerous studies focusing on the impact of nanoparticle shape on thermal dissipation characteristics are available in the literature. Ali et al (2018), Asmadi et al (2022) and Madhura et al (2023), in their studies on the influence of nanoparticle shape on Nanofluid buoyant flow behavior convection of nanoliquids, discovered that the blade-shaped nanoparticle exhibits comparatively greater heat dissipation. However, Elias et al (2014) have reported that the concentric tube heat exchanger exhibited a more significant heat transfer coefficient for cylindrical nanoparticle.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of nanofluid buoyant flow behavior and heat transfer characteristics in annular-shaped enclosure with internal baffle

Reddy,

Yoon,

Mani

et al. 2023

HFF

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Purpose Natural convection in finite enclosures is a common phenomenon in various thermal applications. To provide the thermal design guidelines, this study aims to numerically explore the potential of using internal baffles and nanofluids to either enhance or suppress heat transport in a vertical annulus. Furthermore, the annular-shaped enclosure is filled with aqueous-silver nanofluid and the effects of five distinct nanoparticle shapes are examined. In addition, the influence of baffle design parameters, including baffle position, thickness and length, is thoroughly analyzed. Design/methodology/approach The finite difference method is used in conjunction with the alternating direction implicit and successive line over relaxation techniques to solve nonlinear and coupled partial differential equations. The single phase model is used for nanofluid which is considered as a homogeneous fluid with improved thermal properties. The independence tests are carried out for assessing the sufficiency of grid size and time step for obtaining results accurately. Findings The baffle dimension parameters and nanoparticle shape exhibit significant impact on the convective flow and heat transfer characteristics, leading to the following results: sphere- and blade-shaped nanoparticles demonstrate around 30% enhancement in the heat transport capability compared with platelet-shaped nanoparticles, which exhibit the least. When considering the baffle design parameter, either a decrease in the baffle length and thickness or an increase in baffle height leads to an improvement in heat transport rate. Consequently, a threefold increase in baffle height yields a 40% improvement in thermal performance. Originality/value Understanding the impact of nanoparticle shapes and baffle design parameters on flow and thermal behavior will enable engineers to provide valuable insight on thermal management and overall system efficiency. Therefore, the current work focuses on exploring buoyant nanofluid flow and thermal mechanism in a baffled annular-shaped enclosure. Specifically, an internal baffle that exhibits conductive heat transfer through it is considered, and the impact of baffle dimensions (thickness, length and position) on the fluid flow behavior and thermal characteristics is investigated. In addition, the current study also addresses the influence of five distinct nanoparticle shapes (e.g. spherical, cylindrical, platelet, blade and brick) on the flow and thermal behavior in the baffled annular geometry. In addition to deepening the understanding of nanofluid behavior in a baffled vertical annulus, the current study contributes to the ongoing advancements in thermal applications by providing certain guidelines to design application-specific enclosures.

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“…It was found that brick-shaped and small-sized nanoparticles were preferable in improving the performance of heat exchangers in the application, while the plateletshaped nanoparticles caused a decrement in performance due to high viscosity. Other studies that discussed the nanoparticle shape effects on hybrid nanofluid flow over various geometry are by Iftikhar et al [11], Dinarvand and Rostami [12], Rashid et al [13], Elnaqeeb et al [14], Iftikhar et al [15], and Asmadi et al [16].…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle Shapes Effects on MHD Flow of Hybrid Nanofluid over a Stretching/Shrinking Sheet with Slip and Chemical Reaction

Yahaya

Arifin

Ali

et al. 2022

JNanoR

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The impact of nanoparticle shapes (i.e., blade, brick, cylindrical, platelet, and spherical) on the MHD flow of Ag-MgO/water hybrid nanofluid over a stretching/shrinking sheet is scrutinized in this study. Chemical reaction and activation energy are included in the governing partial differential equations of the flow problem. On the boundary, velocity slip and zero mass flux conditions are considered. The simplification of the governing equations and boundary conditions into non-linear ordinary differential equations is done through similarity transformation. Then, the bvp4c solver in Matlab is deployed for computation, with the results generated in the form of numerical solutions and graphs. It is found that the usage of spherical-shaped nanoparticles produces the lowest magnitude of skin friction coefficient, and the implementation of blade-shaped nanoparticles in the hybrid nanofluid provides the highest enhancement of heat transfer rate. The increment in activation energy slows down the chemical reaction that raises the concentration profile of the hybrid nanofluid. However, the concentration profile decreases as the reaction rate increases.

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Nanoparticle shape effect on the natural-convection heat transfer of hybrid nanofluid inside a U-shaped enclosure

Cited by 13 publications

References 19 publications

Thermodynamic study of the effects of nanoparticles on thermal origin: A review

Thermodynamic study of the effects of nanoparticles on thermal origin: A review

Numerical investigation of nanofluid buoyant flow behavior and heat transfer characteristics in annular-shaped enclosure with internal baffle

Nanoparticle Shapes Effects on MHD Flow of Hybrid Nanofluid over a Stretching/Shrinking Sheet with Slip and Chemical Reaction

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