Purpose

This paper aims to present the effect of entropy generation on the unsteady flow of upper-convected Maxwell nanofluid past a wedge embedded in a porous medium in view of buoyancy force. Cattaneo-Christov double diffusion theory simulates the processes of energy phenomenon and mass transfer. Meanwhile, Brownian motion, thermophoresis and convective boundary conditions are discussed to further visualize the heat and mass transfer properties.

Design/methodology/approach

Coupled ordinary differential equations are gained by appropriate similar transformations and these equations are manipulated by the Homotopy analysis method.

Findings

The result is viewed that velocity distribution is a diminishing function with boosting the value of unsteadiness parameter. Moreover, fluid friction irreversibility is dominant as the enlargement in Brinkman number. Then controlling the temperature and concentration difference parameters can effectively regulate entropy generation.

Originality/value

This paper aims to address the effect of entropy generation on unsteady flow, heat and mass transfer of upper-convected Maxwell nanofluid over a stretched wedge with Cattaneo-Christov double diffusion, which provides a theoretical basis for manufacturing production.

中文翻译：

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具有 Cattaneo-Christov 双扩散的麦克斯韦纳米流体在拉伸楔上非定常流动的熵生成分析

目的

本文旨在根据浮力，介绍熵产生对上对流麦克斯韦纳米流体通过嵌入多孔介质中的楔子的不稳定流动的影响。Cattaneo-Christov 双扩散理论模拟了能量现象和传质过程。同时，讨论了布朗运动、热泳和对流边界条件，以进一步可视化传热和传质特性。

设计/方法/方法

耦合常微分方程通过适当的相似变换得到，这些方程由同伦分析方法处理。

发现

结果认为，速度分布是一个递减函数，不稳定性参数的值增加。此外，随着布林克曼数的增大，流体摩擦不可逆性占主导地位。然后控制温度和浓度差参数可以有效地调节熵的产生。

原创性/价值

本文旨在解决熵产生对具有 Cattaneo-Christov 双扩散的拉伸楔上的上对流麦克斯韦纳米流体的非定常流动、传热和传质的影响，为制造生产提供理论基础。