Oscillatory natural convection of Al2O3-water nanofluid near its density maximum in a narrow horizontal annulus

Hu, Yu‐Peng; Wang, Fengjun; Zhang, Yichen; Li, You–Rong; Li, Minghai

doi:10.1016/j.icheatmasstransfer.2022.106207

Cited by 8 publications

(2 citation statements)

References 37 publications

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“…The wall wavelength had the least effect on heat transfer. Hu et al (2022) in their study extended the scope of nanofluids research by using the finite volume method to examine the oscillatory characteristics of natural convection near its maximum density in a narrow horizontal ring. The equations used were written in polar coordinates.…”

Section: Introductionmentioning

confidence: 99%

Numerical assessment of meshless method for studying nanofluid natural convection in a corrugated wall square cavity

Es-Sabry

Jeyar

Chaabelasri

et al. 2023

Int. J. Renew. Energy Dev.

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This study aims to investigate the impact of various factors, such as wall shape, Rayleigh number, and volume fraction of nanoparticles, on natural convection in a square cavity that is filled with a mixture of Al2O3 solid particles and liquid water. The research employs numerical simulations based on the radial basis function meshless method and the artificial compressibility technique. The results of the study showed that the temperature distribution in the cavity was mostly uniform, except in the vicinity of the hot wall, while the flow was primarily dominated by convection as the Rayleigh number increased. Furthermore, the heat transfer rate increased with the volume fraction of nanoparticles, indicating the significance of nanoparticles in improving the thermal performance of the system. Additionally, the study found that the average Nusselt number, which characterizes the heat transfer efficiency, was highest when the cavity had a wavy wall. For single and double wavy walls, there were respective enhancements of 32% and 6% compared to a regular wall. Additionally, the Nusselt number increased as the volume fraction of nanoparticles, indicating a significant influence of nanoparticle concentration and wall geometry on the fluid flow and heat transfer characteristics in the square cavity. Consequently, this study's outcomes provide crucial insights into designing and optimizing thermal management systems, particularly those utilizing nanofluids.

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Section: Introductionmentioning

confidence: 99%

Numerical assessment of meshless method for studying nanofluid natural convection in a corrugated wall square cavity

Es-Sabry

Jeyar

Chaabelasri

et al. 2023

Int. J. Renew. Energy Dev.

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“…Nanofluids have previously been shown to improve heat transfer efficiency in a variety of engineering applications [9], including heat exchangers [10], heating/cooling systems [11], and solar panel appliances [6]. As a result, new conductive fluids containing various nanoparticles have been developed, such as metal oxides (Al 2 O 3 , ZnO, CuO, SiO 2 , and TiO 2 ) [12][13][14], and carbon-based nanofluids (MWCNTs, GO, and GNPs) [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Graphene‐Based Nanofluids for Energy System and Economic Feasibility

Mohammad

Aldlemy

Ahmed

et al. 2022

Journal of Nanomaterials

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Graphene has piqued the interest of many researchers due to its superior mechanical, thermal, and physiochemical properties. Graphene nanoplatelets with covalently functionalized surfaces (CF-GNPs) were employed in turbulent-heated pipes to undertake thermal and economic studies. CF-GNPs and distilled water were used to make the current nanofluids at various mass percentages, such as 0.025, 0.05, 0.075%, and 0.1 wt.%. In the range of 6,401 Re 11,907, the thermal system was heated up to 11,205 W/m2 under fully developed turbulent flow conditions. Field emission scanning electron microscopy (FE-SEM), zeta potential, nanoparticle sizer, and field emission transmission electron microscopy (FE-TEM) were used to examine the morphological features and characterise the particles. In addition, the current thermal system’s economic performance was assessed to estimate its price-to-operate ratio. There was a 16.10% reduction in heat exchanger size for 0.025 weight percent, 0.05 weight percent, 0.075 weight percent, and 0.1 weight percent. In addition, the power needed for the base fluid was 422 W, which was then lowered to 354 W, 326 W, 315 W, and 298 W for 0.025 wt.%, 0.05 wt.%, 0.075 wt.%, and 0.1 wt.%, respectively.

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Carbon nanotubes/graphene-based nanofluids

Fakharshakeri,

Mhaibes,

Safardoust-Hojaghan

2024

Nanofluids

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Oscillatory natural convection of Al2O3-water nanofluid near its density maximum in a narrow horizontal annulus

Cited by 8 publications

References 37 publications

Numerical assessment of meshless method for studying nanofluid natural convection in a corrugated wall square cavity

Numerical assessment of meshless method for studying nanofluid natural convection in a corrugated wall square cavity

Thermal Analysis of Graphene‐Based Nanofluids for Energy System and Economic Feasibility

Carbon nanotubes/graphene-based nanofluids

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