Impact of Cattaneo-Christov heat flux model on MHD hybrid nano-micropolar fluid flow and heat transfer with viscous and joule dissipation effects

Asifa Tassaddiq

doi:10.1038/s41598-020-77419-x

Abstract

Review of literature reveals that hybrid nanofluids are more effective for heat transmission as compared to the conventional fluids. Nevertheless, the knowledge of developed techniques for the enhancement of heat transmission in hybrid nanofluids has many gaps and, subsequently, an extensive study for such fluids is vital. In this article, the author investigates the effect of hybrid nanoparticles on the thermal efficiency of nano-structured nanoparticles (micropolar fluid) by using the Cattaneo-Christov heat flux model. The magnetic field is pragmatic normal to the hybrid nanofluid flow direction. In order to investigate the influence of physical parameters, the proposed model has been converted to a set of ordinary differential equations (ODEs) by means of involved variables. Furthermore, the analytical and numerical approaches are compared by using different techniques to comprehend the significance of this research. It is found that macro-velocity field reduces with micropolar factor and Hartmann number. A significant result is found in micro-velocity field for the cases when n = 0.5 and n = 0. Also an escalating conduct in thermal field is observed against the increasing estimations of Hartmann number, micropolar parameter, Eckert number, and material parameter.

Highlights

Review of literature reveals that hybrid nanofluids are more effective for heat transmission as compared to the conventional fluids
Shah et al.19–21 recently investigated the effects of heat transfer and thermal radiation on nanofluid flow in different geometries
As the estimations of Hartmann number intensifies, the boundary layer thickness of the velocity field escalates. This is attributable to the datum that the existence of a Hartmann number is measured by the Lorentz force, so throughout a delaying force is conceived throughout the velocity field

Summary

Introduction

Review of literature reveals that hybrid nanofluids are more effective for heat transmission as compared to the conventional fluids. By means of a systematic review, the researchers have found that the analysis (using HAM and Shooting) on the consequence of hybrid nanoparticles on the thermal efficiency of nano-structured nanoparticles (micropolar fluid) has not yet been performed. It is assumed the micropolar fluid flow over an elastic body with Cattaneo-Christov heat flux model conditional on dispersion of hybrid nanoparticles Cu and Al2O3 .

Results

Conclusion