This study investigates the viscous dissipation impact on free convection MHD flow through a porous medium over an exponentially stretching surface in presence of chemical reaction. The basic governing PDEs are converted into non-linear ODE's by using similarity transformations and then using the Keller-box method, numerical solutions are obtained. The flow features of boundary layers along with the bounding surface are identified and analysed using diagrams. It is noted that the increase in the Eckert number, Radiation and Magnetic parameter (M) increases the temperature profiles, while the increase in the chemical reaction parameter, porosity and Schmidt number decreases the concentration profile. To validate the results, a comparative study between the present study and previously published results for a particular case is conducted and good agreement is found between them.

这项研究调查了在存在化学反应的情况下，粘性耗散对自由对流MHD通过指数方向拉伸表面上的多孔介质流动的影响。通过相似性转换将基本的控制PDE转换为非线性ODE，然后使用Keller-box方法获得数值解。边界层和边界表面的流动特征可以通过图表进行识别和分析。注意，埃克特数，辐射和磁参数（M）的增加会增加温度曲线，而化学反应参数，孔隙率和施密特数的增加会降低浓度曲线。为了验证结果，