Comprehensive Analysis of Tetra Hybrid Nanofluid Transport over a Slender Cylinder

Purpose The purpose of this study is to investigate surface conditions that improve flow and thermal transport properties, which are essential for engineering systems, industrial processes and electronic cooling systems. Tetra hybrid nanofluids find applications in multiple industries due to their effective management of flow and heat transport.Design/methodology/approach A system of nondimensional partial differential equations is obtained from the original set of multidimensional, nonlinear PDEs by applying suitable non-similarity transformations. The oscillatory changes in wall velocity induced by surface roughness are illustrated as a sinusoidal waveform at the nominal mean surface.Findings Both graphical and tabular representations are used to provide an exhaustive analysis of key parameters related to flow dynamics and thermal performance. The rough surface of the cylinder induces sinusoidal variations in the skin friction coefficient, with the amplitude of these variations increasing with growing values of n. The rate of heat transfer through the wall in the presence of a rough surface exhibits a more pronounced oscillatory decrease along the wall length. The sinusoidal changes have a greater impact due to a periodic magnetic field (M). The present outcomes are validated through comparison with earlier results, indicating complete consistency with previous studies.Originality/value This research presents a numerical solution of Newtonian tetra hybrid nanofluid flow over a slender cylinder, accounting for surface roughness and a periodic magnetic field. The tetrahybrid nanofluid is composed of Ag-Au-Cu-TiO2 nanoparticles that enhance heat transfer due to their high thermal conductivity.