The impact of variable fluid properties on hydromagnetic boundary layer and heat transfer flows over an exponentially stretching sheet

Asif Mushtaq,Mudassar Razzaq,M Asif Farooq,Razia Sharif

doi:10.1088/2399-6528/ab31e2

Abstract

This paper put forward an analysis of variable fluid properties and their impact on hydromagnetic boundary and thermal layers in a quiescent fluid which is developed due to the exponentially stretching sheet. The viscous incompressible fluid has been set into motion due to aforementioned sheet. We assume that the viscosity and the thermal conductivity of the Newtonian fluid are temperature dependent. The governing boundary layer equations containing continuity, momentum and energy equations are coupled and nonlinear in nature, thereby, cannot be solvable easily by using analytical methods. Since the general boundary layer equations admits a similarity solutions, thus a generalized Howarth-Dorodnitsyn transformations have been exploited for the set-up of a coupled nonlinear ODEs. These transformed ODEs are solved numerically by a shooting method and is verified from MATLAB built-in collocation solver bvp4c for different parameters appearing in the work. We show results graphically and in a tabulated form for a constant and a variable fluid properties. We find that the temperature dependent variable viscosity and a thermal conductivity influence a velocity and a temperature profiles. We show that the thermal boundary layer decreases for constant variable fluid properties and increases for variable fluid properties

Highlights

The principles of heat transfer in manufacturing industry is a chief theory behind the design and production of many household appliances and commercially used devices
The examples of heat transfer can be found in air conditioning system, refrigerators, the TV and the DVD player, to name a few
A three page article by Crane [3] extended the work of Sakiadis [1] in that he took the boundary layer flow over a stretching sheet where velocity varies linearly from the slit

Summary

Introduction

The principles of heat transfer in manufacturing industry is a chief theory behind the design and production of many household appliances and commercially used devices. A three page article by Crane [3] extended the work of Sakiadis [1] in that he took the boundary layer flow over a stretching sheet where velocity varies linearly from the slit. Soundalgekar and Murty [7] tackled a heat transfer problem past a continuous semiinfinite flat plate in which temperature varies nonlinearly i.e. Ax n, where A is a constant and n is never o or 1. They observed that the Nusselt number increases with increasing the exponent n. For detail the reader is referred to Dutta et al [9], Grubka and Bobba [10,11,12,13,14,15,16,17,18,19,20,21], and forthcoming cited literature in paragraphs

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Conclusion