The characteristics of Stefan blowing effects in a magneto-hydrodynamic flow of a Casson fluid past a stretching sheet are investigated. The effects of radiation, heat source/sink, Newtonian heating, Arrhenius activation energy and binary chemical reaction are considered for heat and mass transfer analysis. The homotopy analysis method (HAM) was utilised to solve the transformed non-dimensionalized equations analytically. The impact of various physical parameters affecting the flow are investigated. Further, the relationship of various parameters on the skin friction and rate of heat and mass transfer was explored using correlation and probable error. A sensitivity analysis was carried out based on the Response Surface Methodology to analyse the effect of Stefan blowing parameter, magnetic parameter and stretching/shrinking parameter on the reduced Nusselt number and reduced Sherwood number. A constant positive sensitivity for the reduced Nusselt number towards the Stefan blowing parameter for all levels of magnetic parameter and stretching/shrinking parameter was found. Further, the reduced Sherwood number indicated a negative sensitivity towards the Stefan blowing parameter.

研究了Casson流体经过拉伸片材的磁流体流中的Stefan吹气效应的特性。在传热和传质分析中考虑了辐射，热源/汇，牛顿加热，阿累尼乌斯活化能和二元化学反应的影响。运用同伦分析方法（HAM）来解析地求解变换后的无量纲方程。研究了各种物理参数对流量的影响。此外，利用相关性和可能的​​误差，探索了各种参数对皮肤摩擦和传热与传质速率的关系。根据响应面方法进行了敏感性分析，以分析Stefan吹气参数的影响，减小的努塞尔数和减小的舍伍德数的磁性参数和拉伸/收缩参数。发现对于所有水平的磁性参数和拉伸/收缩参数，对于Stefan吹气参数而言，减小的努塞尔特数均具有恒定的正灵敏度。此外，减小的舍伍德数表示对Stefan吹气参数的负灵敏度。