Thermophysical properties of magnetic nanofluids under effects of magnetic field-a review on mechanisms and studies

IF 3 3区 工程技术 Q2 CHEMISTRY, ANALYTICAL
Seyed Mohammad Vahidhosseini, Mohammad Amin Bidi, Saman Rashidi
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Abstract

Magnetic nanofluids play a crucial role in enhancing thermal properties, providing a promising pathway for optimizing energy supply systems and improving heat transfer efficiency. Beyond advanced thermal management, these innovative fluids showcase potential applications in the medical field, underscoring their versatility in addressing challenges across various industries. In this review, emphasis is placed on the nature and philosophy of magnetic field effects on the thermophysical properties, explaining basic mechanisms and investigating implications across applications. Under magnetic influence, particles align, forming clusters and chains, influencing thermal conductivity, viscosity, and specific heat capacity. Temperature variations serve a vital function, impacting the fluid’s response to magnetic fields. Brownian motion, affected by these fields, contributes to controlled particle motion, while agglomeration tendencies under magnetic conditions further shape thermal properties. In this review, several key findings about the behavior of magnetic nanofluids are revealed. For example, it is found that by increasing the magnetic field intensity at a constant shear rate, the viscosity first reaches a plateau and then decreases with further increases in field intensity. Furthermore, below/above the Curie temperature, the alignment of magnetic nanoparticles increases/decreases, influencing thermal expansion coefficient. This review presents two novel aspects that have not yet been compiled coherently elsewhere: firstly, an in-depth description of the nature and mechanisms of the magnetic field’s effect on thermophysical properties, and secondly, an examination of the rarely investigated properties of thermal expansion coefficient and specific heat capacity.

Abstract Image

磁场效应下磁性纳米流体的热物理性质--机理与研究综述
磁性纳米流体在增强热性能方面发挥着至关重要的作用,为优化能源供应系统和提高传热效率提供了一条前景广阔的途径。除了先进的热管理,这些创新流体还展示了在医疗领域的潜在应用,凸显了它们在应对各行各业挑战方面的多功能性。在这篇综述中,重点放在磁场对热物理性质影响的性质和原理上,解释基本机制并研究各种应用的影响。在磁场影响下,颗粒会排列成簇和链,从而影响热导率、粘度和比热容。温度变化具有重要作用,会影响流体对磁场的反应。受这些磁场影响的布朗运动有助于控制粒子运动,而磁性条件下的团聚趋势则进一步塑造了热特性。本综述揭示了有关磁性纳米流体行为的几个重要发现。例如,研究发现,在恒定剪切速率下增加磁场强度,粘度首先达到一个高点,然后随着磁场强度的进一步增加而降低。此外,在居里温度以下/以上,磁性纳米粒子的排列会增加/减少,从而影响热膨胀系数。本综述介绍了其他地方尚未汇编的两个新方面:首先,深入描述了磁场对热物理性质影响的性质和机制;其次,研究了热膨胀系数和比热容这些很少被研究的性质。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
8.50
自引率
9.10%
发文量
577
审稿时长
3.8 months
期刊介绍: Journal of Thermal Analysis and Calorimetry is a fully peer reviewed journal publishing high quality papers covering all aspects of thermal analysis, calorimetry, and experimental thermodynamics. The journal publishes regular and special issues in twelve issues every year. The following types of papers are published: Original Research Papers, Short Communications, Reviews, Modern Instruments, Events and Book reviews. The subjects covered are: thermogravimetry, derivative thermogravimetry, differential thermal analysis, thermodilatometry, differential scanning calorimetry of all types, non-scanning calorimetry of all types, thermometry, evolved gas analysis, thermomechanical analysis, emanation thermal analysis, thermal conductivity, multiple techniques, and miscellaneous thermal methods (including the combination of the thermal method with various instrumental techniques), theory and instrumentation for thermal analysis and calorimetry.
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