Abstract A boundary layer analysis of three dimensional electromagnetic flows of single and multi walls carbon nanotubes over the surface of a thin needle is addressed. Both single wall (SWCNTs) and multi wall (MWCNTs) are considered as nanoparticles whereas water is considered as base liquid. The energy equation is modeled by using non-linear thermal radiation because it has a major impact on the solar energy absorption capacity of nanofluid. Because of such solar energy utilization at greater scale, global warming/pollution levels can be controlled. Homogeneous-heterogeneous reactions are taken into consideration as they find their applications in catalysis, biochemical systems, combustion, batteries, corrosion phenomenon and electrolytic cells. Xue model describing the augmentation of thermal conductivity of carbon nanotubes is invoked. Entropy generation model is adopted because its minimization prevents the loss of available energy which in turn boosts the efficiency of thermal systems. Nonlinear differential equations representing flow expressions are numerically solved by shooting technique. The outcome of the present study is that velocity field lines are grown due to strengthening of electric field parameter in the flow of SWCNT-water and MWCNT-water nanofluids. Brinkman number uplifts the entropy generation.

中文翻译：

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具有优化熵产生和立方自动催化化学反应的 SWCNT/MWCNT 悬浮液的电磁流动

摘要 解决了单壁和多壁碳纳米管在细针表面上的三维电磁流的边界层分析。单壁（SWCNT）和多壁（MWCNT）都被认为是纳米颗粒，而水被认为是基液。能量方程通过使用非线性热辐射建模，因为它对纳米流体的太阳能吸收能力有重大影响。由于这种更大规模的太阳能利用，可以控制全球变暖/污染水平。均相-非均相反应在催化、生化系统、燃烧、电池、腐蚀现象和电解池中的应用被考虑在内。调用描述碳纳米管热导率增加的薛模型。采用熵生成模型是因为它的最小化防止了可用能量的损失，从而提高了热系统的效率。代表流动表达式的非线性微分方程通过射击技术进行数值求解。本研究的结果是，由于增强了 SWCNT-water 和 MWCNT-water 纳米流体流动中的电场参数，速度场线会增加。Brinkman 数提高了熵生成。本研究的结果是，由于增强了 SWCNT-water 和 MWCNT-water 纳米流体流动中的电场参数，速度场线会增加。Brinkman 数提高了熵生成。本研究的结果是，由于增强了 SWCNT-water 和 MWCNT-water 纳米流体流动中的电场参数，速度场线会增加。Brinkman 数提高了熵生成。