Cattaneo-Christov Heat and Mass Model for Radiative EMHD Aluminum Alloys (7072/7072 + 7075 T6) with Transformer Base Oil Hybrid Nanofluid Over an Exponentially Stretching Sheet

This correspondence, a three-dimensional radiative magnetohydrodynamic flow of hybrid nanofluid across an exponentially stretching surface, is discussed. In this study, we contemplate aluminum alloys of 7072 and 7072 + 7075 T6 type with transformer oil base liquid. AA7070 is composition of zinc and aluminum in the ratio of 98 and 1 with supplementary metals copper, magnesium, zinc, and aluminum in the proportion of ~ 1, ~ 3, ~ 6, and ~ 90 correspondingly. AA 7075 is a composite of 90% Al, 5.5% Zn, 2.6% Mg, 0.24% Cr, and 1.5% Cu. The density of these alloys’ mixture is 3.81 gm/cm 3 . It is one of the strongest aluminum alloys having reinforce process (heat treatment up to 300–500°C) to reconfigure any metal’s crystal structure to provide the mechanical deformation at low density than other metal alloys. These alloy mixtures found some applications in missile parts making, aerospace system, defense, aircraft designing and fittings, steel worm gears and in many other discipline. These alloy mixtures are treated in conventional fluid to enhance the heat transfer characteristics of nanofluid. Flow is induced by Cattaneo-Christov heat mass flux model perception. The solutions of reduced dimensionless nonlinear ordinary differential equations are handled through Mathematica built-in ND Solve scheme. A significant role of several physical parameters governed by the equation of motions is discussed through plots. Comparisons with the previously published article also validate the efficiency of the technique as well. Results show that the heat transfer rate of the AA7072/AA7075 hybrid nanofluid is remarkably enormous as compared with the usual nanofluid.