Abstract

This study reports on combined thermal radiation, chemical reaction, and magnetic field effects on entropy generation in an unsteady nanofluid flow past an inclined cylinder using the Buongiorno model. We consider the impact of viscous dissipation, velocity slip conditions, thermal slip conditions, and the Brownian motion. The transport equations governing the flow are solved using an overlapping grid spectral collocation method. The results indicate that entropy generation is suppressed significantly by thermal radiation and chemical reaction parameters but enhanced with the magnetic field, viscous dissipation, the Brinkman number, and the Reynolds number. Also, fluid flow variables are affected by the thermophoresis parameter, the angle of cylinder inclination, and the Richardson number. We present the findings of the skin friction coefficient, the Nusselt number, and the Sherwood number. The model is applicable in fields such as the petroleum industry, building industries, and medicine.

中文翻译：

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热辐射和磁场联合作用对非恒定流体通过倾斜圆柱体时熵产生的影响的数值研究

摘要

这项研究使用Buongiorno模型报告了热辐射，化学反应和磁场对通过倾斜圆柱体的非稳态纳米流体流中熵产生的综合影响。我们考虑了粘性耗散，速度滑移条件，热滑移条件和布朗运动的影响。使用重叠网格光谱搭配方法求解控制流动的输运方程。结果表明，热辐射和化学反应参数显着抑制了熵的产生，但磁场，粘性耗散，布林克曼数和雷诺数则增强了熵的产生。而且，流体流量变量受热泳参数，圆柱体倾斜角度和理查森数影响。我们介绍了皮肤摩擦系数的发现，Nusselt号和Sherwood号。该模型适用于石油工业，建筑工业和医药等领域。