Analysis of AA7072-AA7075/CH3OH in mixed convection flow with couple stress effect

Zainal, Nurul Amira and Mokhtar, Dg Marina and Zuberi, Haris Alam (2025) Analysis of AA7072-AA7075/CH3OH in mixed convection flow with couple stress effect. JP Journal of Heat and Mass Transfer, 38 (4). pp. 601-615. ISSN 0973-5763

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Abstract

Couple stress is a distinctive fluid property that plays a vital role in predicting flow behavior within microscale channels, where high shear rates are prevalent. Hence, this study presents a numerical investigation of convective heat transfer in a couple stress hybrid nanofluid composed of AA7072-AA7075 nanoparticles dispersed in methanol (CH3OH). The governing partial differential equations are reduced to ordinary differential equations via similarity transformations and solved using MATLAB’s bvp4c solver. The results reveal significant effects of both couple stress and nanoparticle composition on the fluid’s thermal and flow characteristics. Notably, under conditions of strong opposing flow, the hybrid nanofluid exhibited up to a 5.38% reduction in heat transfer compared to the base fluid. Additionally, increasing the couple stress parameter diminished surface momentum and heat transfer, as evidenced by lower skin friction coefficients and local Nusselt numbers.

Item Type:	Article
Uncontrolled Keywords:	Bvp4c, Couple stress, Hybrid nanofluid, Methanol, Mixed convection
Divisions:	Faculty Of Mechanical Technology And Engineering
Depositing User:	Sabariah Ismail
Date Deposited:	13 Aug 2026 02:43
Last Modified:	13 Aug 2026 02:43
URI:	http://eprints.utem.edu.my/id/eprint/30230
Statistic Details:	View Download Statistic

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