Lone Showkat Ahmad, Anwar Sadia, Raizah Zehba, Kumam Poom, Seangwattana Thidaporn, Saeed Anwar
Department of Basic Sciences, College of Science and Theoretical Studies, Saudi Electronic University (Jeddah-M), Riyadh, 11673, Kingdom of Saudi Arabia.
Department of Mathematics, College of Arts and Sciences, Wadi Ad Dawasir, 11991, Prince Sattam Bin Abdulaziz University, Al-Kharj, Kingdom of Saudi Arabia.
Heliyon. 2023 Jul 4;9(7):e17751. doi: 10.1016/j.heliyon.2023.e17751. eCollection 2023 Jul.
This article presents the magnetohydrodynamic (MHD) flow of a nanoliquid due to a rotating sphere at a stagnation point. The flow is considered to be influenced by the magnetic field, dissipative, thermally radiative, and chemically reactive. Also, the thermophoretic and Brownian motion influences are taken into consideration. Some restrictions in the present analysis are taken: like there is no-slip and convective conditions, joule heating, Hall effects and buoyancy-driven. The solution of the present analysis is derived through the homotopy analysis method (HAM). The significance of several physical parameters on velocities, thermal and concentration profiles are shown with the help of Figures. Also, the significance of different physical factors on skin frictions, local Nusselt number and Sherwood number are demonstrated with the help of Tables. The outcomes show that the Nusselt number is lower for the larger Brownian motion parameter, Eckert number, and thermophoretic parameter, while the increment in the thermal radiation parameter augmented the Nusselt number. It is established that the increasing rotation, magnetic and positive constant parameters have increased the velocity profiles along the -direction while reducing the velocity profiles along the z-direction of the nanoliquid flow. The increasing positive constant parameter reduces the thermal graph of the nanoliquid flow. Furthermore, the intensifying Eckert number, thermophoresis, Brownian motion, and thermal radiation factor have escalated the thermal profiles of the nanoliquid flow.
本文介绍了在驻点处由旋转球体引起的纳米流体的磁流体动力学（MHD）流动。该流动被认为受到磁场、耗散、热辐射和化学反应的影响。此外，还考虑了热泳和布朗运动的影响。本分析采用了一些限制条件：如无滑移和对流条件、焦耳热、霍尔效应和浮力驱动。本分析的解是通过同伦分析方法（HAM）推导出来的。借助图表展示了几个物理参数对速度、温度和浓度分布的影响。同时，借助表格展示了不同物理因素对表面摩擦力、局部努塞尔数和舍伍德数的影响。结果表明，对于较大的布朗运动参数、埃克特数和热泳参数，努塞尔数较低，而热辐射参数的增加会增大努塞尔数。研究发现，旋转、磁场和正常数参数的增加会使纳米流体沿x方向的速度分布增加，而沿z方向的速度分布减小。正常数参数的增加会降低纳米流体流动的温度图。此外，埃克特数、热泳、布朗运动和热辐射因子的增强会使纳米流体流动的温度分布升高。
