Entropy optimized radiative nanomaterial flow beyond classical concepts of heat and mass fluxes

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-04-05 DOI:10.1016/j.csite.2025.106088

T. Hayat , Muhammad Fahim , Aneeta Razaq , Mohamed Abdalla

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引用次数: 0

Abstract

Involvement of nanomaterials in such manufacturing processes is not underestimated. Especially the rheological nanomaterials for heat transfer are useful in processes related to cooling microchips, solar energy and thermal energy technology. Experimental studies have now witnessed the efficiency for utilization of nanoparticles regarding heat transportation enhancement. With such consideration here we analyze magnetohydrodynamic (MHD) flow of tangent hyperbolic nanomaterial. Analysis involves novel concepts of nonlinear mixed convection and entropy generation. New concepts of heat and mass fluxes for thermal and solutal transport rates are utilized. Brownian movement and thermophoresis behaviors are under consideration. Heat expression contains thermal radiation. Entropy optimization with Cattaneo-Christov theory through entire new concept of radiation is discussed. Nonlinear ordinary differential system by adequate transformations is derived. Optimal homotopy analysis technique (OHAM) for convergent solutions is implemented. Analysis of flow, temperature, rate of entropy and concentration is provided. Performances of Nusselt and Sherwood numbers for influential variables are graphically explored. Here one can conclude that flow through buoyancy ratio and magnetic field respond in a reverse manner. Temperature and entropy rate for radiation have same trend. Higher thermal Biot number lead to enhancement of Nusselt number and thermal field. Higher approximation of solutal relaxation time variable corresponds to rise of concentration. An intensification in rate of entropy through diffusion variable is witnessed.

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熵优化辐射纳米材料超越经典概念的热和质量通量

纳米材料在这种制造过程中的作用不容低估。特别是用于传热的流变纳米材料在与冷却微芯片、太阳能和热能技术相关的过程中非常有用。实验研究已经证明了纳米颗粒在增强热输运方面的有效性。考虑到这一点，本文分析了正切双曲型纳米材料的磁流体动力学流动。分析涉及非线性混合对流和熵生成的新概念。热通量和溶质输运率采用了热通量和质量通量的新概念。考虑了布朗运动和热泳行为。热表示包含热辐射。从全新的辐射概念出发，讨论了基于Cattaneo-Christov理论的熵优化问题。通过适当的变换，导出了非线性常微分系统。实现了收敛解的最优同伦分析技术。给出了流量、温度、熵率和浓度的分析。对影响变量的Nusselt数和Sherwood数的表现进行了图形化的探讨。在这里，我们可以得出结论，通过浮力比和磁场的流动以相反的方式响应。辐射的温度和熵率具有相同的趋势。热Biot数的增加导致努塞尔数和热场的增强。溶质弛豫时间变量的高近似值对应于浓度的升高。通过扩散变量可以看到熵率的增强。

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.