Abstract

This paper studied the effects of suction/blowing parameters of magnetohydrodynamic (MHD) nanofluid’s viscous flow over an exponentially stretching sheet. In this work, nanofluid flow of water-based copper was considered as a nanoparticle. The radiation parameters, velocity and thermal slip constraint, and magnetic field were applied in similarity transformations to solve the nonlinear ordinary differential equations (ODEs) approximately by reducing the nonlinear partial differential equations (PDEs). The obtained numerical results of velocity and temperature against different values of suction/blowing parameters with varying profiles were displayed and analyzed by using Maple 18 software based on the fourth-fifth order Runge-Kutta Fehlberg technique with shooting method. The dimensionless Velocity decreased with the increasing magnetic field, suction/blowing, and thermal slip condition parameters. Whereas, the profiles of temperature intensified with the growing magnetic field, velocity slip and thermal radiation parameters. Finally, in the experiment, the effect of increased velocity and thermal slip parameters in general caused decrease in the heat transfer with base fluid, but in case of nanofluid this impact was lesser. Alternatively, it can be stated that the effect of suction/blowing parameter caused a decrease and then an increase in the heat transfer.

Highlights

  • Nanotechnology is the suspension of nanomaterials or nanoparticles in base liquids such as water, ethylene glycol and oil, these particles taken from solid of materials with a high thermal conductivity such as copper, copper oxide, aluminium, titanium, etc

  • A numerical analysis was done to find out the MHD viscous flow and radiative heat transfer at the steady boundary layer over an exponentially stretched sheet

  • Various values of the magnetic, radiation, velocity and thermal slip conditions, and suction/blowing parameters were numerically executed for governing equations (ODEs) along with the boundary conditions in equations (10), [14,15,16]

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Summary

Introduction

Nanotechnology is the suspension of nanomaterials or nanoparticles in base liquids (or base fluids) such as water, ethylene glycol and oil, these particles taken from solid of materials with a high thermal conductivity such as copper, copper oxide, aluminium, titanium, etc. These base liquids are low in transferring heat because of the low thermal conductivity at them, and because of the importance of the uses of these fluids, scientists were interested in developing a method to make these fluids with high thermal conductivity in different rate according to the nature of these fluids. Buongiorno [5] technique analysed the effects of Brownian motion and thermophoresis mainly to suspend nanoparticles

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