Entropy generation in magneto nanofluid flow with Joule heating and thermal radiation

Abstract

Purpose

This paper aims to investigate entropy generation in an incompressible magneto-micropolar nanofluid flow over a nonlinear stretching sheet. The flow is subjected to thermal radiation and viscous dissipation. The energy equation is extended by considering the impact of the Joule heating term because of an imposed magnetic field.

Design/methodology/approach

The flow, heat and mass transfer model are solved numerically using the spectral quasilinearization method. An analysis of the performance of this method is given.

Findings

It is found that the method is robust, converges fast and gives good accuracy. In terms of the physically significant results, the authors show that the irreversibility caused by the thermal diffusion the dominants other sources of entropy generation and the surface contributes significantly to the total irreversibility.

Originality/value

The flow is subjected to a combination of a buoyancy force, viscous dissipation, Joule heating and thermal radiation. The flow equations are solved numerically using the spectral quasiliearization method. The impact of a range of physical and chemical parameters on entropy generation, velocity, angular velocity, temperature and concentration profiles are determined. The current results may help in industrial applicants. The present problem has not been considered elsewhere.

Citation

Almakki, M., Mondal, H. and Sibanda, P. (2020), "Entropy generation in magneto nanofluid flow with Joule heating and thermal radiation", World Journal of Engineering, Vol. 17 No. 1, pp. 1-11. https://doi.org/10.1108/WJE-06-2019-0166