Abstract This article addresses the (MHD) magnetohydrodynamic flow of second grade nano-fluid. Stagnation point flow towards a stretched Riga wall is examined. Heat and mass transfer analyses are based upon Cattaneo-Christov (CC) theory. These considerations are entirely different than classical heat and mass fluxes by Fourier and Fick's laws. In addition, the convective condition of heat transfer is involved. Novel concept of entropy generation is highlighted. Formulation also consists of thermal radiation, heat generation and mixed convection. Brownian motion and thermophoresis effects through double diffusion concepts in energy and concentration expressions are modeled in correct manner. The resulting problems are computed by modern approach known as Optimal homotopy analysis method (OHAM). This technique is frequently used for solving non-linear differential equations encountered in applied science and engineering. Total square residual error is computed. Velocity enhances for higher values of second grade and magnetic parameters. Higher estimation of thermal relaxation and solutal concentration parameter both temperature concentration are reducing. Physical arguments for important parameters of interest are organized.

中文翻译：

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Cattaneo-Christov 在 MHD 二级纳米流体流中通过里加壁的双重扩散和熵产生

摘要 本文讨论了二级纳米流体的 (MHD) 磁流体动力学流动。检查流向拉长的里加墙的滞点流。传热和传质分析基于 Cattaneo-Christov (CC) 理论。根据傅立叶和菲克定律，这些考虑与经典的热通量和质量通量完全不同。此外，还涉及传热的对流条件。突出了熵生成的新概念。配方还包括热辐射、发热和混合对流。布朗运动和热泳效应通过能量和浓度表达式中的双扩散概念以正确的方式建模。由此产生的问题是通过称为最优同伦分析方法 (OHAM) 的现代方法计算的。这种技术经常用于求解应用科学和工程中遇到的非线性微分方程。计算总平方残差。对于更高的二级和磁参数值，速度会增强。热弛豫和溶质浓度参数的较高估计，温度浓度都在降低。组织感兴趣的重要参数的物理参数。