Thermal performance of a hybrid nanofluid flow through a stretchable stationary disk featuring the Cattaneo-Christov heat flux theory

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2024-10-18 DOI:10.1016/j.csite.2024.105296

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Abstract

A hybrid nanofluid is comprised of a (Ethylene glycol) base fluid component and (Copper and Aluminium oxide) nanoparticles, and the nanoparticles are scattered inside the Ethylene glycol. Integrating nanoparticles into a base fluid (Ethylene glycol) can significantly enhance its thermal conductivity, which in turn can boost the base fluid's rate of heat transfer. In addition, the dynamics of viscous fluid together with nanoparticles is quite interesting and has a large of applications in the industrial sector. The current predominately predictive modeling investigates the flow of the hybrid nanofluid via a stretchable stationary disk in the presence of heat source/sink. A progressive modification in he energy equation is done by utilizing the Cattaneo-Christov heat flux expressions. This theory provides predictions for the features of the thermal relaxation time of the liquid on the boundary layer flow. Further, the study focuses on the features of the Lorentz force resulting from the applied of a magnetic field perpendicular to the disk. The similarity approach is used to obtained the dimensionless ordinary differential equations.The bvp4c approach in Matlab is utilized as a numerical method for the solution. All the solutions are obtained through graphical form. According to the results, the thermal profile is reduced by adjusting the thermal relaxation time parameter. Motion of the hybrid nanofluid slows down by enlarging the magnetic force parameter. Additionally, the effect of the heat source significantly increases the thermal profile. It is noted that the temperature field is enhanced in the case of a larger Lorentz force. Moreover, the increase in volume fraction concentration intensifies the thermal distribution, but the velocity is diminished due to the effect of viscosity.

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采用卡塔尼奥-克里斯托夫热通量理论的混合纳米流体流经可拉伸静止圆盘的热性能

混合纳米流体由（乙二醇）基础流体成分和（铜和氧化铝）纳米粒子组成，纳米粒子分散在乙二醇中。将纳米颗粒融入基础流体（乙二醇）可显著提高其导热性，从而提高基础流体的传热速率。此外，粘滞流体与纳米颗粒的动力学也非常有趣，在工业领域有大量应用。目前的主要预测模型研究了在热源/散热器存在的情况下，混合纳米流体通过可拉伸固定盘的流动情况。利用卡塔尼奥-克里斯托夫热通量表达式对能量方程进行了渐进式修改。该理论可预测液体热弛豫时间对边界层流动的影响。此外，研究还关注了垂直于圆盘的磁场所产生的洛伦兹力的特征。采用相似性方法求得无量纲常微分方程，并利用 Matlab 中的 bvp4c 方法作为数值求解方法。所有解法均通过图形形式获得。结果表明，通过调整热弛豫时间参数，可以减小热剖面。通过增大磁力参数，混合纳米流体的运动速度减慢。此外，热源的影响也会显著增加热剖面。值得注意的是，在洛伦兹力较大的情况下，温度场会增强。此外，体积分数浓度的增加会加强热分布，但由于粘度的影响，速度会减小。

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

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.