Unsteady MHD hybrid nanofluid flow towards a horizontal cylinder
Document Type
Article
Publication Date
5-1-2022
Abstract
Transport phenomena near the stagnation region are common in the manufacturing industry, especially in polymer and extrusion processes, which need continuous improvement to enhance the process's quality standard. Hence, the present numerical investigation aims to test the performance of unsteady stagnation-point flow past a stretching/shrinking horizontal cylinder in a hybrid nanofluid. The impact of a magnetic field on the boundary layer flow is also considered. The mathematical model that had been simplified is solved numerically via the MATLAB bvp4c procedure. Several decisions have arisen from the numerical findings of this study. The results reveal that as the concentration of nanoparticle volume fraction increases, which infers the transition of nano-fluid to hybrid nanofluids, a 2% increment in heat transfer rate is observed. The unsteadiness parameter clearly improves thermal performance by a 50:50 mixing ratio containing 2% of copper and alumina nanoparticles. Furthermore, increasing the curvature parameter evidently increases thermal efficiency by approximately 22.8%. On the other hand, increasing the magnetic parameter deteriorates thermal properties, leading to a drastic reduction in the heat transfer rate up to 32.6%. Finally, the initial solution's stability is confirmed by the stability analysis.
Keywords
Stagnation-point, Hybrid nanofluid, MHD, Stretching, shrinking cylinder, Unsteady flow
Divisions
MathematicalSciences
Funders
Universiti Kebangsaan Malaysia (GUP-2019-034)
Publication Title
International Communications in Heat and Mass Transfer
Volume
134
Publisher
Elsevier
Publisher Location
THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND