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Steadily revolving flow of Sisko fluid along a stretchable boundary with non-linear radiation effects
Pramana ( IF 2.8 ) Pub Date : 2021-07-18 , DOI: 10.1007/s12043-021-02149-2
Talat Rafiq 1 , M Mustafa 1
Affiliation  

The heat transfer effects in rotating flow above an extensible surface immersed in a non-Newtonian fluid obeying Sisko fluid model is considered in this article. The model is widely accepted for analysing flow behaviour of many industrial liquids including lubricating greases. Thermal transport existing in the non-linear radiative heat flux is investigated. Conservation equations are simplified using boundary layer approximations before these are reduced to locally similar differential equations through appropriate transformations. We adopted a highly convenient package bvp4c of MATLAB to find numerical results for both integer and non-integer values of flow behaviour index n. Solutions are analysed graphically for diverse range of controlling parameters. Akin to the earlier works, temperature curve exhibits an inflection point in the case of relatively large wall temperature. Furthermore, wall temperature gradient vanishes for increasing values of temperature ratio parameter. Graphical results demonstrate that stretching effect combined with Sisko fluid assumption can provide considerable improvement in the cooling process of the surface, which is certainly beneficial in some technological processes.



中文翻译:

沿具有非线性辐射效应的可拉伸边界的 Sisko 流体稳定旋转流

本文考虑了浸入遵循 Sisko 流体模型的非牛顿流体中的可扩展表面上方旋转流中的传热效应。该模型被广泛用于分析包括润滑脂在内的许多工业液体的流动行为。研究了非线性辐射热通量中存在的热传输。在通过适当的变换将守恒方程简化为局部相似的微分方程之前,使用边界层近似简化了守恒方程。我们采用了 MATLAB 的一个非常方便的包 bvp4c 来查找流动行为指数n 的整数和非整数值的数值结果. 针对不同范围的控制参数以图形方式分析解决方案。类似于早期的工作,温度曲线在壁温相对较大的情况下表现出拐点。此外,壁温梯度随着温度比参数值的增加而消失。图形结果表明,拉伸效应结合 Sisko 流体假设可以显着改善表面的冷却过程,这在某些工艺过程中肯定是有益的。

更新日期:2021-07-19
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