Thermodynamics of Cattaneo–Christov heat flux theory on hybrid nanofluid flow with variable viscosity, convective boundary, and velocity slip

IF 3 3区 工程技术 Q2 CHEMISTRY, ANALYTICAL
Nahid Fatima, Refka Ghodhbani, Aaqib Majeed, Nouman Ijaz, Najma Saleem
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Abstract

This work aims to analyze the behavior of the Cattaneo–Christov heat flux theory on hybrid nanofluid flow, and the heat transportation that occurs across a stretchable porous space. In this study, energy equation incorporates the combined effects of thermal radiation and Cattaneo–Christov heat flux. Because of their potential uses in various domains, hybrid nanofluids—a more sophisticated type of nanofluids recognized for their improved thermal properties—are being studied. A two-dimensional hybrid nanofluid system with copper (Cu) and alumina oxide (AlO2) nanoparticles distributed throughout a base fluid of water (H2O) is described by the mathematical model created here. The study includes other elements like viscous dissipation and changing viscosity. Similarity transformations are used to turn the governing partial differential equations (PDEs) into ordinary differential equations, which are then numerically solved using a shooting approach and the MATLAB Bvp4c solver. The impact of crucial parameters on velocity and temperature profiles is carefully investigated in this study. These parameters include the Weissenberg number, magnetic parameter relaxation time, Prandtl number, thermal radiation parameter, velocity slip parameter, Biot number, convection parameter, suction parameter, heat source parameter, and Eckert number. In comparison to conventional nanofluids, the hybrid nanofluid's temperature profile shows a notable rise, according to the data. In certain circumstances, the results also closely match existing solutions. By outperforming traditional nanofluids, this discovery holds promise for improving the performance of industrial heat exchangers, automobile radiators, and electrical gadgets.

变黏度、对流边界和速度滑移混合纳米流体的Cattaneo-Christov热流理论热力学
本工作旨在分析Cattaneo-Christov热流理论在混合纳米流体流动中的行为,以及在可拉伸多孔空间中发生的热传递。在本研究中,能量方程包含了热辐射和Cattaneo-Christov热通量的综合效应。由于其在各个领域的潜在用途,混合纳米流体——一种更复杂的纳米流体类型,以其改善的热性能而闻名——正在被研究。本文建立的数学模型描述了一个由铜(Cu)和氧化氧化铝(AlO2)纳米颗粒分布在水(H2O)基液中的二维混合纳米流体系统。该研究还包括其他因素,如粘性耗散和粘度变化。利用相似变换将控制偏微分方程转化为常微分方程,然后利用射击法和MATLAB Bvp4c求解器对其进行数值求解。研究了关键参数对速度和温度分布的影响。这些参数包括Weissenberg数、磁参数弛豫时间、普朗特数、热辐射参数、速度滑移参数、Biot数、对流参数、吸力参数、热源参数、Eckert数等。数据显示,与传统纳米流体相比,混合纳米流体的温度曲线明显上升。在某些情况下,结果也与现有的解决方案非常匹配。通过超越传统的纳米流体,这一发现有望改善工业热交换器、汽车散热器和电子设备的性能。
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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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