Rehman Ali, Saeed Anwar, Salleh Zabidin, Jan Rashid, Kumam Poom
Department of Mathematics, Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, Kuala Nerus 21030, Terengganu, Malaysia.
Center of Excellence in Theoretical and Computational Science (TaCS-CoE), Science Laboratory Building, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), 126 Pracha-Uthit Road, Bang Mod, Thung Khru, Bangkok 10140, Thailand.
Nanomaterials (Basel). 2022 Mar 28;12(7):1108. doi: 10.3390/nano12071108.
The heat transfer ratio has an important role in industry and the engineering sector; the heat transfer ratios of CNT nanofluids are high compared to other nanofluids. This paper examines the analytical investigation of the time-dependent stagnation point flow of a CNT nanofluid over a stretching surface. For the investigation of the various physical restrictions, single and multi-walled carbon nanotubes (SWCNTs, MWCNTs) were used and compared. The defined similarity transformation was used, to reduce the given nonlinear partial differential equations (PDEs) to nonlinear ordinary differential equations (ODEs). The model nonlinear ordinary differential equations were solved, with an approximate analytical (OHAM) optimal homotopy asymptotic method being used for the model problem. The impact of different parameters such as magnetic field parameter, unsteady parameter, dimensionless nanoparticles volume friction, Prandtl number, and Eckert number are interpreted using graphs, in the form of the velocity and temperature profile.
传热比在工业和工程领域中具有重要作用；与其他纳米流体相比，碳纳米管纳米流体的传热比很高。本文研究了碳纳米管纳米流体在拉伸表面上随时间变化的驻点流动的解析研究。为了研究各种物理限制，使用并比较了单壁和多壁碳纳米管（SWCNT、MWCNT）。使用定义的相似变换，将给定的非线性偏微分方程（PDE）简化为非线性常微分方程（ODE）。求解了模型非线性常微分方程，采用近似解析（OHAM）最优同伦渐近方法求解模型问题。通过速度和温度分布曲线的形式，用图表解释了磁场参数、非稳态参数、无量纲纳米颗粒体积分数、普朗特数和埃克特数等不同参数的影响。
