Hydromagnetic Flow of Heat and Mass Transfer in a Nano Williamson Fluid Past a Vertical Plate With Thermal and Momentum Slip Effects: Numerical Study
Hydromagnetic Flow of Heat and Mass Transfer in a Nano Williamson Fluid Past a Vertical Plate With Thermal and Momentum Slip Effects: Numerical Study
复制标题
具有热和动量滑移效应的纳米威廉姆森流体通过垂直板的磁流传热和传质：数值研究
DOI：
10.1515/nleng-2017-0057
复制
发表时间：
2019
影响因子：
--
通讯作者：
V. Prasad
中科院分区：
文献类型：
--
作者：
N. Nagendra;C. Amanulla;M. Reddy;V. Prasad
本文研究了垂直平板外表面上导电聚合物内的热、动量和质量（组分）传递。布朗运动和热泳的影响被纳入模型中存在的热和纳米颗粒的质量传递对流条件。采用威廉姆森粘弹性模型，这是某些工业聚合物的代表。在适当的边界条件下，采用二阶精度隐式Keller盒有限差分法求解无量纲的动量和能量边界层方程。文中给出了Weissenberg数、磁体力参数、热滑移参数、流体动力学滑移参数、流向变量和普朗特数对热流体特性的影响，并进行了讨论。随着Weissenberg数的增加，温度会出现微弱的升高，而在板表面附近计算出流动的显著加速。随着Weissenberg数的增加，传热速率降低。该研究与导电纳米材料的包覆过程有关，可能用于航空航天，智能涂层运输现象和其他行业。
Abstract In this article, the study of heat, momentum and mass (species) transfer in an electro-conductive polymer on the external surface of a vertical plate. The effects of Brownian motion and thermophoresis are incorporated in the model in the presence of both heat and nanoparticle mass transfer convective conditions. The Williamson viscoelastic model is employed which is representative of certain industrial polymers. The non-dimensional, transformed boundary layer equations for momentum and energy are solved with the second order accurate implicit Keller box finite difference method under appropriate boundary conditions. The influence of Weissenberg number, magnetic body force parameter, thermal slip parameter, hydrodynamic slip parameter, stream wise variable and Prandtl number on thermo fluid characteristics are presented graphically and discussed. A weak elevation in temperature accompanies increasing Weissenberg number whereas a significant acceleration in the flow is computed near the plate surface. Rate of heat transfer is reduced with increases the Weissenberg number. The study is relevant to enrobing processes for electric-conductive nano-materials, of potential use in aerospace, smart coating transport phenomena and other industries.