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首页> 外文期刊>Journal of engineering mathematics >Thermodynamic effect in Darchy-Forchheimer nanofluid flow of a single-wall carbon nanotube/multi-wall carbon nanotube suspension due to a stretching/shrinking rotating disk: Buongiorno two-phase model
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Thermodynamic effect in Darchy-Forchheimer nanofluid flow of a single-wall carbon nanotube/multi-wall carbon nanotube suspension due to a stretching/shrinking rotating disk: Buongiorno two-phase model

机译：拉伸/收缩旋转盘对单壁碳纳米管/多壁碳纳米管悬浮液的达奇-福希海默纳米流体流动的热力学效应：Buongiorno两相模型

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摘要

The present article gives an analysis of the impact of Darcy-Forchheimer flow and partial slip along with heat transfer in single-wall carbon nanotube/multi-wall carbon nanotube (SWCNT/MWCNT)-water nanofluid flow over a stretching/shrinking rotating disk. The study considers the heat transfer in nanofluids, using both static and dynamic models, namely the Xue and Buongiorno models, respectively. The effects of thermal radiation and viscous dissipation are considered. Nonlinear transformed coupled equations are solved computationally using a spectral quasilinearisation method. The numerical results show the impact of several physical parameters on radial and tangential velocity, temperature and nanoparticle concentration fields. The slip parameter accounts for a significant enhancement in the radial velocity and a decline in the tangential/azimuthal velocity. The presence of a porous medium has the effect of reducing the amplitude of velocity and momentum layer thickness for both SWCNTs-water and MWCNTs-water nanofluids. The present study indicates that the tangential velocity of SWCNT/MWCNT-water nanofluids diminishes due to the increment in slip parameter, while the radial velocity exhibits the reverse trends. The results also show that the involvement of a porous matrix gives rise to reduced velocity of SWCNT/MWCNT-water nanofluids. It is also observed that MWCNTs make a greater contribution in augmenting the heat transfer rate compared to SWCNT nanoparticles.
机译：本文分析了在拉伸/收缩旋转盘上单壁碳纳米管/多壁碳纳米管（SWCNT / MWCNT）-水纳米流体流中达西-福希海默流和部分滑移以及传热的影响。该研究使用静态模型和动态模型（分别为Xue模型和Buongiorno模型）考虑了纳米流体中的传热。考虑了热辐射和粘性耗散的影响。使用频谱拟线性化方法可对非线性变换的耦合方程进行计算求解。数值结果表明几个物理参数对径向和切线速度，温度和纳米粒子浓度场的影响。滑移参数说明径向速度显着提高，而切向/方位角速度下降。对于SWCNTs-水和MWCNTs-水纳米流体，多孔介质的存在具有降低速度振幅和动量层厚度的作用。本研究表明，由于滑移参数的增加，SWCNT / MWCNT-水纳米流体的切向速度减小，而径向速度则呈现相反的趋势。结果还表明，多孔基质的参与导致SWCNT / MWCNT-水纳米流体的速度降低。还观察到，与SWCNT纳米颗粒相比，MWCNT在增加传热速率方面做出了更大的贡献。

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