Hassan Ali, Hussain Azad, Arshad Mubashar, Alanazi Meznah M, Zahran Heba Y
Department of Mathematics, University of Gujrat, Gujrat 50700, Pakistan.
Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
Nanomaterials (Basel). 2022 Mar 8;12(6):891. doi: 10.3390/nano12060891.
Thermal heat generation and enhancement have been examined extensively over the past two decades, and nanofluid technology has been explored to address this issue. In the present study, we discuss the thermal heat coefficient under the influence of a rotating magneto-hydrodynamic hybrid nanofluid over an axially spinning cone for a prescribed wall temperature (PWT) case. The governing equations of the formulated problem are derived by utilizing the Rivlin-Ericksen tensor and boundary layer approximation (BLA). We introduce our suppositions to transform the highly non-linear partial differential equations into ordinary differential equations. The numerical outcomes of the problem are drafted in MATLAB with the of help the boundary value problem algorithm. The influences of several study parameters are obtained to demonstrate and analyze the magneto-hydrodynamic flow characteristics. The heat and mass transfer coefficients increase and high Nusselt and Sherwood numbers are obtained with reduced skin coefficients for the analyzed composite nanoparticles. The analyzed hybrid nanofluid (SWCNT-Ag-kerosene oil) produces reduced drag and lift coefficients and high thermal heat rates when compared with a recent study for SWCNT-MWCNT-kerosene oil hybrid nanofluid. Maximum Nusselt (Nu) and Sherwood (Sh) numbers are observed under a high rotational flow ratio and pressure gradient. Based on the results of this study, we recommend more frequent use of the examined hybrid nanofluid.
在过去二十年中，人们对热生成和强化进行了广泛研究，并探索了纳米流体技术来解决这一问题。在本研究中，我们讨论了在规定壁温（PWT）情况下，旋转磁流体动力学混合纳米流体作用于轴向旋转圆锥时的热系数。利用里夫林 - 埃里克森张量和边界层近似（BLA）推导了所提出问题的控制方程。我们引入假设将高度非线性的偏微分方程转化为常微分方程。该问题的数值结果在MATLAB中借助边值问题算法得出。获得了几个研究参数的影响结果，以展示和分析磁流体动力学流动特性。对于所分析的复合纳米颗粒，传热和传质系数增加，并且在表皮系数降低的情况下获得了较高的努塞尔数和舍伍德数。与最近关于单壁碳纳米管 - 多壁碳纳米管 - 煤油混合纳米流体的研究相比，所分析的混合纳米流体（单壁碳纳米管 - 银 - 煤油）产生的阻力和升力系数降低，热速率较高。在高旋转流率和压力梯度下观察到最大努塞尔数（Nu）和舍伍德数（Sh）。基于本研究结果，我们建议更频繁地使用所研究的混合纳米流体。
