Ragavi M, Sreenivasulu P, Poornima T
Department of Mathematics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, 632014, India.
Department of Mathematics, Sri Venkateswara College of Engineering, Tirupati, 517507, India.
Heliyon. 2025 Jan 26;11(3):e42172. doi: 10.1016/j.heliyon.2025.e42172. eCollection 2025 Feb 15.
This study aims to scrutinize the numerical exploration of the unsteady axisymmetric flow of hybrid nanofluid (Ag-Gr\HO) across a radial surface. This research addresses the need for enhanced heat transfer mechanisms in industrial applications by incorporating the effects of convective thermal transfer, suction\injection, Joule heating, and viscous dissipation. The collection of flow-controlling Partial Differential Equations (PDEs) has been simplified to Ordinary Differential Equations (ODEs) by the appropriate similarity transformations. Further, the finite difference method (Keller Box technique) is incorporated to determine the numerical solutions with the assistance of MATLAB software. The fluid flow and thermal distributions are examined to understand the impact of different factors such as magnetic strength, unsteadiness, Eckert number, Biot number, suction\injection, porosity, and nanoparticle volume fraction. The results demonstrate significant enhancements in thermal distribution for the enhanced Eckert number and Biot number. As magnetic and porosity parameters increase, the flow distribution declines. Moreover, the tabular form depicts local changes in Nusselt number and skin friction coefficient for a certain range of embedded parameters. The present study was compared to prior studies and showed remarkable concurrence with previous findings. This consistency underscores the robustness of our methodology and the reliability of the results.
本研究旨在详细探究混合纳米流体（Ag-Gr\HO）在径向表面上的非定常轴对称流动的数值模拟。本研究通过纳入对流热传递、抽吸/注入、焦耳热和粘性耗散的影响，满足了工业应用中强化传热机制的需求。通过适当的相似变换，将控制流动的偏微分方程（PDEs）简化为常微分方程（ODEs）。此外，采用有限差分法（Keller Box技术）并借助MATLAB软件来确定数值解。研究流体流动和热分布，以了解诸如磁场强度、非定常性、埃克特数、毕渥数、抽吸/注入、孔隙率和纳米颗粒体积分数等不同因素的影响。结果表明，随着埃克特数和毕渥数的增加，热分布有显著增强。随着磁场和孔隙率参数的增加，流动分布下降。此外，表格形式展示了在一定范围内的嵌入参数下努塞尔数和表面摩擦系数的局部变化。本研究与先前的研究进行了比较，结果与先前的发现显著一致。这种一致性强调了我们方法的稳健性和结果的可靠性。
