Entropy Generation Analysis and Radiated Heat Transfer in MHD (Al2O3-Cu/Water) Hybrid Nanofluid Flow

Micromachines

Saeed Ehsan Awan¹  Muhammad Awais²  Nabeela Parveen²  Muhammad Yousaf Malik³  Yigang He⁴  Wasim Ullah Khan⁴ 

[1] Department of Electrical and Computer Engineering, Attock Campus, COMSATS University Islamabad, Attock 43600, Pakistan;Department of Mathematics, Attock Campus, COMSATS University Islamabad, Attock 43600, Pakistan;Department of Mathematics, College of Sciences, King Khalid University, Abha 61413, Saudi Arabia;School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China;

关键词: hybrid nanofluid;    entropy generation;    induced magnetic field;    convective boundary conditions;    thermal radiations;    stretching disk;   

DOI  :  10.3390/mi12080887

来源: DOAJ

【 摘 要 】

This research concerns the heat transfer and entropy generation analysis in the MHD axisymmetric flow of Al₂O₃-Cu/H₂O hybrid nanofluid. The magnetic induction effect is considered for large magnetic Reynolds number. The influences of thermal radiations, viscous dissipation and convective temperature conditions over flow are studied. The problem is modeled using boundary layer theory, Maxwell’s equations and Fourier’s conduction law along with defined physical factors. Similarity transformations are utilized for model simplification which is analytically solved with the homotopy analysis method. The h-curves up to 20th order for solutions establishes the stability and convergence of the adopted computational method. Rheological impacts of involved parameters on flow variables and entropy generation number are demonstrated via graphs and tables. The study reveals that entropy in system of hybrid nanofluid affected by magnetic induction declines for β while it enhances for Bi, R and λ. Moreover, heat transfer rate elevates for large Bi with convective conditions at surface.

【 授权许可】

Unknown