Enhanced heat transfer analysis of micropolar hybrid-nanofluids in an incinerator-shaped cavity

IF 5.1 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2025-03-10 DOI:10.1016/j.tsep.2025.103471

Shafqat Hussain , Prakash Jayavel , Bander Almutairi , Katta Ramesh

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Abstract

This study investigates natural convection heat transport in micropolar fluids within an incinerator-shaped cavity, employing a mathematical model and numerical simulations. The research addresses the challenge of improving thermal efficiency in systems where conventional fluids and geometries often limit performance. By incorporating hybrid nanofluids (Ag-MgO nanoparticles), the study aims to enhance thermal conductivity and heat transfer efficiency, offering potential advancements for industrial and engineering applications. Key factors, including the Rayleigh number, geometrical configurations, and nanoparticle volume fraction, are examined for their influence on velocity, temperature, and microrotation profiles. The corresponding mathematical model is simulated using the finite element method, revealing critical insights into the system’s thermal characteristics. Results indicate that a higher Rayleigh number enhances heat transfer through stronger convection. Moderate undulations in the cavity slightly reduce the average Nusselt number, while excessive waviness impairs heat transfer. Increasing the nanoparticle volume fraction improves thermal conductivity, and the addition of hybrid nanoparticles (Ag-MgO) further boosts heat transfer efficiency. Optimal heat transfer is achieved with smaller wavy wall amplitudes and higher nanoparticle volume fractions, while larger amplitudes negatively impact performance. These findings provide a pathway for designing more efficient heat transfer systems, with implications for advanced thermal management in energy, manufacturing, and environmental technologies.

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来源期刊

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

期刊介绍： Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.