This investigation studies the flow of a Newtonian fluid close to stagnation point past a stretching/shrinking plate embedded in a porous media. Heat transfer analysis with nonlinear thermal radiation (TR) is also carried out. Homogeneous-heterogeneous reactions with unequal diffusivities of reactants take place in the fluid. The controlling partial differential equations (DEs) of the existing model are reduced to dimensionless ordinary DEs through similarity transformations. These subsequent equations are numerically tackled with the guide of the shooting procedure. The velocity, temperature and concentration’s behaviour has been inspected for specific estimations of the including parameters. The viscous fluid (VF) temperature increases with nonlinear TR. The change in the concentration profile due to the diffusion coefficient rate \( \delta \) is more prominent in the concentration of specie D compared to specie C. Heterogeneous reaction parameter intensity is very helpful in reducing the concentration of bulk fluid \( \phi_{1}(\eta) \) as well as increasing the surface catalyst concentration \( \phi_{2}(\eta) \)

这项研究研究了接近停滞点的牛顿流体流过嵌入多孔介质中的拉伸/收缩板。还使用非线性热辐射（TR）进行了传热分析。流体中发生反应物扩散不均的均相反应。现有模型的控制偏微分方程（DE）通过相似性变换简化为无量纲的普通DE。这些后续方程在射击程序的指导下得到了数值求解。已经检查了速度，温度和浓度的行为，以获取对包含参数的特定估计。粘性流体（VF）温度随非线性TR的增加而增加。浓度分布因扩散系数率而变化相较于物种C，\（\ delta \）在物种D的浓度中更为突出。非均相反应参数强度对于降低散装流体\（\ phi_ {1}（\ eta）\）以及增加表面催化剂浓度\（\ phi_ {2}（\ eta）\）