Impact of Exponential Heat Source and Thermal Radiation on the flow of Hybrid Nanofluid across a Bi-Directional Stretching Surface with Activation Energy

Abstract

Abstract The study focuses on how activation energy and exponential heat source affects the radiative motion of a hybrid nanofluid (EG + ZnO + TiO 2) over a bidirectional elongating sheet. Convective boundary condition is assumed. The bvp4c, an inherent function in MATLAB, is used to unravel the altered system deduced from those equations which describe the current work in the two scenarios, i.e., binary (EG + ZnO + TiO 2) and mono (EG + ZnO) nanofluids. Added a little quantitative discussion regarding engineering parameters including Sherwood number. The most notable findings from this study are mentioned here. Enhanced volume fraction of ZnO lessens the fluid velocity and increasing heat source parameter step-up the fluid temperature. It was noticed that with a raise in magnetic field and the volume fraction of ZnO lessens the friction factor. The rate of mass transfer is lowered with the enhanced activation energy parameter and the same enhances as the reaction rate parameter is amplified. The increment quantities in the Sherwood number against the reaction rate parameter (Γ) are 0.35151 (EG + ZnO + TiO 2) and 0.35125 (EG + ZnO), when Γ is set to 0 ≤ Γ ≤ 0.9. Furthermore, the decrement rates in mass transfer rate against the activation parameter (En ) are observed as 0.02681 (EG + ZnO + TiO 2) and 0.02687 (EG + ZnO), when En is set to 0 ≤ En ≤ 2.5. It is detected that there is an amelioration in the heat transmission rate with the raise in Biot number (Bi). It has been noticed that, when Bi fixed to be 0 ≤ Bi ≤ 0.8, Nusselt number is lowered by 0.736332 (EG + ZnO + TiO 2) and 0.621826 (EG + ZnO). Our findings are checked against previous findings for validity. A reasonable compromise has been uncovered.