Effect of Brinkman and Maiga's correlations of viscosity on forced convection turbulent flow

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2024-11-18 DOI:10.1016/j.icheatmasstransfer.2024.108367

Praveen James Sanga , Prabal Datta , Arbind Kumar

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Abstract

A numerical study on forced convection turbulent flow in a top-curved surface vented cavity is conducted to investigate the influence of uncertainties in the viscosity formulas using two different types of nanofluid i.e., water-Al₂O₃ and water-CuO. The Brinkman and Maiga et al. correlations for viscosity are employed to examine their effect on heat transfer and skin friction for a range of Reynolds number. A finite volume method using RNG k-ε turbulent model is considered for solving governing equations numerically. The outcomes of the present study exhibit significant difference in the average Nusselt number and average skin friction on the top-curved heated wall surface of the cavity for two viscosity models employed. For water-Al₂O₃ nanofluid, these differences are strongly dependent on volume fraction of nanoparticles as well as on the Reynolds number. In contrast, for water-CuO nanofluid, the difference in average Nusselt number is solely depended on Reynolds number while the average skin friction difference is vigorously reliant on volume fraction of the nanoparticles as well as on the Reynolds number.

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布林克曼和麦加的粘度相关性对强制对流湍流的影响

对顶部曲面通风空腔中的强制对流湍流进行了数值研究，利用两种不同类型的纳米流体（即水-Al2O3 和水-CuO）研究了粘度公式中不确定因素的影响。研究采用了布林克曼和 Maiga 等人的粘度相关性，以考察它们在一定雷诺数范围内对传热和皮肤摩擦的影响。考虑使用 RNG k-ε 湍流模型有限体积法对控制方程进行数值求解。本研究的结果表明，在采用两种粘度模型的情况下，空腔顶部曲面受热壁面上的平均努塞尔特数和平均皮肤摩擦力存在显著差异。对于水-Al2O3 纳米流体，这些差异与纳米颗粒的体积分数和雷诺数密切相关。相比之下，对于水-CuO 纳米流体，平均努塞尔特数的差异完全取决于雷诺数，而平均皮肤摩擦力的差异则主要取决于纳米颗粒的体积分数和雷诺数。

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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.