Synergistic effect of synthesized Fe3O4@Graphene oxide nanohybrids on heat transfer enhancement and flow efficiency in nanofluids for advanced thermal applications

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2025-03-24 DOI:10.1016/j.ijthermalsci.2025.109878

Altynay Sharipova , Mojtaba Shafiee , Marzieh Lotfi , Farshid Elahi

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Abstract

The advancement of hybrid nanofluids has attracted significant interest for their ability to address the limitations of single-component nanofluids in thermal management applications. This study focuses on the synthesis, characterization, and performance evaluation of Fe₃O₄@Graphene Oxide (Fe₃O₄@GO) nanohybrids, utilizing the exceptional thermal conductivity of GO along with the stability and magnetic properties of Fe₃O₄ to enhance heat transfer efficiency. Fe₃O₄@GO nanohybrids were synthesized via a modified chemical method and characterized using XRD, FTIR, and SEM, confirming uniform decoration of Fe₃O₄ nanoparticles on GO sheets. Experimental investigations in a helical coil heat exchanger revealed a maximum heat transfer enhancement (HTE) of 270 % for Fe₃O₄@GO nanofluids compared to 56 % for pure GO nanofluids at optimal conditions (0.1 wt% concentration, Reynolds number Re = 17,000). At Re = 8,000, Fe₃O₄@GO nanofluids exhibited a 50–120 % improvement in heat transfer efficiency, depending on concentration. The friction factor analysis demonstrated that Fe₃O₄@GO nanofluids reduced flow resistance more effectively than GO nanofluids, achieving up to 4 % drag reduction at Re = 11,000 and 0.075 wt% concentration. This improvement is attributed to the synergistic effects of Fe₃O₄ nanoparticles and GO, which enhance dispersion stability and reduce interfacial thermal resistance. Key thermophysical parameters, including Nusselt number and pressure drop, were optimized to ensure efficient thermal-hydraulic performance. The study highlights the role of Fe₃O₄ nanoparticles in improving the stability and heat transfer properties of GO nanofluids. The combination of high thermal conductivity, enhanced flow behavior, and reduced viscosity effects positions Fe₃O₄@GO nanofluids as promising candidates for high-performance thermal management applications. These findings provide significant insights into the design of advanced hybrid nanofluids for industrial heat exchanger systems, addressing limitations in traditional nanofluids.

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合成的 Fe3O4@Graphene oxide 纳米杂化物对先进热应用纳米流体中传热增强和流动效率的协同效应

混合纳米流体的发展吸引了人们极大的兴趣，因为它们能够解决单组分纳米流体在热管理应用中的局限性。本研究的重点是Fe3O4@Graphene Oxide （Fe3O4@GO）纳米杂化材料的合成、表征和性能评估，利用氧化石墨烯的优异导热性以及Fe3O4的稳定性和磁性来提高传热效率。通过改进的化学方法合成了Fe3O4@GO纳米杂化物，并利用XRD、FTIR和SEM对其进行了表征，证实了Fe3O4纳米颗粒在氧化石墨烯薄片上的均匀修饰。在螺旋盘管换热器中的实验研究表明，在最佳条件下（0.1 wt%浓度，雷诺数Re = 17,000）， Fe3O4@GO纳米流体的最大传热增强（HTE）为270%，而纯氧化石墨烯纳米流体的最大传热增强（HTE）为56%。在Re = 8000时，Fe3O4@GO纳米流体的传热效率提高了50 - 120%，这取决于浓度。摩擦因数分析表明，Fe3O4@GO纳米流体比氧化石墨烯纳米流体更有效地降低了流动阻力，在Re = 11000和0.075 wt%的浓度下，可实现高达4%的阻力降低。这种改善是由于Fe3O4纳米颗粒和GO的协同作用，增强了分散稳定性，降低了界面热阻。优化了包括努塞尔数和压降在内的关键热物性参数，以确保高效的热工水力性能。该研究强调了Fe3O4纳米颗粒在改善氧化石墨烯纳米流体稳定性和传热性能方面的作用。高导热性、增强的流动性和降低的粘度效应使Fe3O4@GO纳米流体成为高性能热管理应用的有前途的候选者。这些发现为工业热交换器系统的先进混合纳米流体的设计提供了重要的见解，解决了传统纳米流体的局限性。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.