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Entropy generation of dissipative flow of carbon nanotubes in rotating frame with Darcy-Forchheimer porous medium: A numerical study
Journal of Molecular Liquids ( IF 6 ) Pub Date : 2018-07-21 , DOI: 10.1016/j.molliq.2018.07.071
G.S. Seth , R. Kumar , A. Bhattacharyya

This research article explains the influence of magnetic field and volume fraction of carbon nanotubes (CNTs) on the flow over a stretching sheet in rotating frame. We analysed the behaviour of base fluid such as water with both kind of CNTs i.e. multi-wall carbon nanotubes (MWCNTs) and single-wall carbon nanotubes (SWCNTs). The nanofluid transport mechanism is obtained following Xue model. The mathematical model is developed by order of magnitude analysis. Governing partial differential equations are first converted into a system of ordinary differential equations making the use of suitable similarity transformation and then solved by fourth order finite difference scheme using Newton's linearization technique, which helps us to deal with the non-linear terms in a very smooth way. Numerical simulation for the fluid velocity and fluid temperature along with Nusselt number and skin friction coefficient are carried out for a set of values of different regulatory flow parameters that characterize the physics of the flow graphically. An outstanding correlation is perceived in tabular form of mesh density solutions of different length of domain obtained by fourth order finite difference scheme. The Biot number, Brinkmann number and applied magnetic field have vital effects on the thermal energy irreversibility in terms of Bejan number.



中文翻译:

Darcy-Forchheimer多孔介质在旋转框架中碳纳米管耗散流的熵产生:数值研究

这篇研究文章解释了磁场和碳纳米管(CNT)的体积分数对旋转框架中拉伸片上流动的影响。我们用两种碳纳米管(即多壁碳纳米管(MWCNT)和单壁碳纳米管(SWCNT))分析了诸如水之类的基础流体的行为。遵循薛模型获得了纳米流体的传输机理。通过数量级分析来开发数学模型。首先将支配的偏微分方程式转换为一个常微分方程式系统,然后利用适当的相似性变换,然后使用牛顿线性化技术通过四阶有限差分方案进行求解,这有助于我们以非常平滑的方式处理非线性项方法。对一组不同的调节流量参数值进行了流体速度和流体温度以及Nusselt数和蒙皮摩擦系数的数值模拟,这些值以图形方式表征了流体的物理性质。通过四阶有限差分方案获得的不同域长度的网格密度解决方案的表格形式可以看到出色的相关性。毕奥数,布林克曼数和外加磁场对热能不可逆性的贝詹数有重要影响。通过四阶有限差分方案获得的不同域长度的网格密度解决方案的表格形式可以看到出色的相关性。毕奥数,布林克曼数和外加磁场对热能不可逆性的贝詹数有重要影响。通过四阶有限差分方案获得的不同域长度的网格密度解决方案的表格形式可以看到出色的相关性。毕奥数,布林克曼数和外加磁场对热能不可逆性的贝詹数有重要影响。

更新日期:2018-07-21
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