Analysis of MHD mixed convection in a Ag-TiO2 hybrid nanofluid flow past a slender cylinder

Abstract

The concept of MHD mixed convection with Ag-TiO2 / H2O hybrid nanofluid flow over a slender cylinder find its several applications in the field of science and engineering. Especially, in designing and manufacturing of coating of wires, fibre sheets, optical fibres, photo electric devices, solar cells etc. A uniform magnetic field is applied to analyse its impact on transport characteristics of the flow. The different nanoparticles shape factor is considered in order to study the behaviour of thermal efficiency. The study of such flow problems involving physical aspects such as mixed convection, thermo-physical behaviours of hybrid nanofluid and uniform applied magnetic field is an innovative approach. The mathematical model describing the fluid flow has been formulated by nonlinear coupled partial differential equations with boundary constraints. Further, the governing equations have been transformed into dimensionless form by utilizing appropriate non-similar transformations and are attempted for the solution in combination with Quasilinearization technique and implicit finite difference approximation. The simulation comprises the various physical parameters, such as velocity ratio parameter, mixed convection parameter (Richardson number) Ri, magnetic field parameter M, Eckert number Ec, nanofluid volume fraction φ1, hybrid nanofluid volume fraction φ2 and nanoparticles shape factor s are demonstrated through graphs. The results unveil that inclusion of the hybrid nanoparticles in the base fluid result in high heat transfer than that of nanofluid and base fluid. Further, the velocity of the hybrid nanofluid is enhanced for the enhancing values of mixed convection parameter and velocity ratio parameter. The hybrid nanofluid temperature rises with raising values of magnetic parameter and volume fraction of Ag-TiO2, significantly.