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

Nabeela Parveen,Muhammad Awais,Saeed Ehsan Awan,Muhammad Yousaf Malik,Yigang He,Wasim Ullah Khan

doi:10.3390/mi12080887

Nabeela Parveen, Muhammad Awais + Show 4 more

Open Access

https://doi.org/10.3390/mi12080887

Copy DOI

Abstract

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.

Highlights

MHD boundary layer flows of electrically conducting fluids and heat transfer caused by a stretching sheet have gained immense importance due to their ample applications and significant bearings on several engineering and technological processes
Boundary-layer flow combined with heat transfer and followed by a stretching sheet was primarily proposed by Sakiadis [1]
The analysis of viscous dissipation, thermal radiations and convective wall conditions in fluid flow has its importance in view of its broad coverage including chemical, mechanical, and aerospace engineering, paper production, continuous casting, stretching of plastic films, cooling of electronic chips and crystal growing etc

Summary

Introduction

MHD boundary layer flows of electrically conducting fluids and heat transfer caused by a stretching sheet have gained immense importance due to their ample applications and significant bearings on several engineering and technological processes. Boundary-layer flow combined with heat transfer and followed by a stretching sheet was primarily proposed by Sakiadis [1]. Crane [2] investigated flow caused by stretching sheets of plastic material. Rates of flow and heat transfer were analyzed in terms of coefficients of friction and thermal conductivity, respectively. The analysis of viscous dissipation, thermal radiations and convective wall conditions in fluid flow has its importance in view of its broad coverage including chemical, mechanical, and aerospace engineering, paper production, continuous casting, stretching of plastic films, cooling of electronic chips and crystal growing etc. Khan et al [3] explored analysis of heat and mass transfer in three-dimensional nanofluids flowing on a linear

Objectives

Methods

Discussion

Conclusion