Theoretical analysis of entropy generation in second grade nanofluid considering heat source/sink over a rotating disk

Abstract

Purpose

This study aims to focus on second grade fluid flow over a rotating disk in the presence of chemical reaction. Uniform magnetic field is also taken into account. Because of the smaller magnetic Reynolds number, induced magnetic field is negligible. Heat equation is constructed by considering heat source/sink.

Design/methodology/approach

Suitable variables are used to transform nonlinear partial differential equations to ordinary ones. Convergent series solutions are attained by applying homotopy analysis method.

Findings

Trends of different parameters on concentration, velocity and temperature are shown graphically. Skin friction coefficient and local Nusselt number are calculated and investigated under the effect of elaborated parameters. An elevation in the value of magnetic field parameter causes collapse in the velocity distributions. Velocity distribution in increasing function of viscoelastic parameter. Temperature and concentration profiles are decreasing functions of viscoelastic parameter. Concentration distribution reduces by increasing the chemical reaction parameter. There is more surface drag force for larger M, while opposite behavior is noted for β.

Originality/value

To the best of the authors’ knowledge, such consideration is yet to be published in the literature.

Citation

Javed, M.F., Jameel, M., Khan, M.I., Qayyum, S., Khan, N.B. and Khan, T.A. (2021), "Theoretical analysis of entropy generation in second grade nanofluid considering heat source/sink over a rotating disk", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 31 No. 11, pp. 3279-3303. https://doi.org/10.1108/HFF-02-2019-0142