Impact of chemically reactive species on heat and mass transfer of polymeric fluid with Soret and Dufour effects

The article studies the impact of chemically reactive species on the transportation of heat and mass in a polymer-added liquid past a linearly stretching surface inserted in a porous medium taking Soret and Dufour effects into consideration. The Oldroyd-B model is opted to examine polymer insertion in the base liquid. Polymer concentration is represented by gamma (0 < gamma < 1), where gamma = 0 represents the absence of polymers. Rapid changes in boundary layer locality cause polymers to elongate, which adds an extra term in the momentum equation. Problem defining partial differential equations are converted to a set of ordinary differential equations by introducing suitable similarity variables. Drag force, mass transfer rate (MTR) and heat transfer rate (HTR) at the wall are studied and numerical solutions are attained by applying the shooting scheme with the fourth-order Runge-Kutta method. Diminution in drag force and heat transfer while expansion in mass transportation at surface is noticed and the polymer insertion is found to be the significant reason for this. The influence of chemically reactive species on MTR and HTR is also investigated when Dufour and Soret effects are also taken into consideration.