In the present communication, the laminar, incompressible, hydromagnetic flow of an electrically conducting non-Newtonian (Sisko) fluid over a bi-directional stretching sheet in a porous medium is studied theoretically. Thermal radiation flux, homogeneous–heterogeneous chemical reactions and convective wall heating are included in the model. The resultant nonlinear ordinary differential equations with transformed boundary conditions via similarity transformation are then solved with the semi-analytical Adomain Decomposition Method (ADM). Validation with earlier studies is included for the nonradiative case. Extensive visualization of velocity, temperature and species concentration distributions for various emerging parameters is included. Increasing the magnetic field and inverse permeability parameter is observed to decelerate both the primary and secondary velocity magnitudes whereas they increase temperatures in the regime. Increasing sheet stretching ratio weakly accelerates the primary flow throughout the boundary layer whereas it more dramatically accelerates the secondary flow near sheet surface. Temperature is consistently reduced with increasing stretching sheet ratio whereas it is strongly enhanced with greater radiative parameter. With greater Sisko non-Newtonian power-law index the primary velocity and temperature are decreased whereas the secondary velocity is increased. Increasing both homogenous and heterogeneous chemical reaction parameters is found to weakly and more strongly, respectively, deplete concentration magnitudes whereas greater Schmidt number enhances them.

中文翻译：

---

具有均匀-非均匀反应的多孔介质中磁性非牛顿流体的辐射-对流双向拉伸流动的域计算

在本通讯中，理论上研究了在多孔介质中双向拉伸片上导电非牛顿 (Sisko) 流体的层流、不可压缩流体磁流。模型中包括热辐射通量、均相-异相化学反应和对流壁加热。然后使用半解析域分解法 (ADM) 求解通过相似变换得到的具有变换边界条件的非线性常微分方程。非辐射病例包括早期研究的验证。包括各种新兴参数的速度、温度和物种浓度分布的广泛可视化。观察到增加磁场和反向磁导率参数会降低初级和次级速度幅度，而它们会增加该区域的温度。增加片材拉伸比会微弱地加速整个边界层的一次流动，而它更显着地加速片材表面附近的二次流动。温度随着拉伸片比的增加而持续降低，而随着辐射参数的增加而强烈提高。随着更大的 Sisko 非牛顿幂律指数，初级速度和温度降低，而次级速度增加。发现增加均相和异相化学反应参数分别较弱和更强，