Role of Endothermic/Exothermic Chemical Reactions in Swirl Flow of Reiner–Rivlin Fluid Over a Stretching Disk

ABSTRACT The Reiner–Rivlin fluid lies in a special category of non‐Newtonian fluid models that reveal viscoelastic features. The constitutive relation of the Reiner–Rivlin fluid model for boundary layer flow typically incorporates both elastic and viscous behaviors influencing the thermal rate and reaction kinetics. The present study investigates the influence of exothermic/endothermic reactions in steady‐state incompressible flow of Reiner–Rivlin fluid triggered by a rotational movement of a stretching disk. The axisymmetric flow assumption is assumed for laminar boundary layer flow stream. The dimensionalized system of governing equations is obtained by introducing similar variables. The resulting system of nonlinear coupled differential equations is then solved through a built‐in package of Runge–Kutta–Fehlberg (RKF‐45) method. The graphical results of flow, thermal, and concentration fields are drawn and discussed against physical quantities. Furthermore, the numerical values of moment torque, skin‐friction coefficient, heat transfer rate, and mass transfer rate are also calculated at the disk surface and addressed in tabular format. It is observed that Reiner–Rivlin fluid parameter reduces the velocity field along radial and axial directions, while the velocity field is magnified in the tangential direction. The thermal field is enhanced during the exothermic and chemical reaction process. The concentration levels are intensified by the activation energy parameter. The Nusselt number is reduced against increasing values of temperature difference parameter. The modifying values of external pollutant concentration decline the Sherwood number.