Numerical simulation of heat and mass transfer in magnetic nanofluid flow by a rotating disk with variable fluid properties
Numerical simulation of heat and mass transfer in magnetic nanofluid flow by a rotating disk with variable fluid properties
复制标题
具有可变流体特性的旋转盘在磁性纳米流体流动中传热传质的数值模拟
DOI：
10.1016/j.icheatmasstransfer.2022.105977
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发表时间：
2022
影响因子：
7
通讯作者：
I. Badruddin
中科院分区：
文献类型：
--
作者：
K. Sharma;N. Vijay;F. Mabood;I. Badruddin
旋转圆盘上流体流动的研究在许多工业、工程和科学领域都有重要的应用。磁流体的铁磁流体动力学经历了与旋转圆盘的壁结合的磁场的影响。目前的调查认为，铁磁流体动力学流动的磁性纳米流体所造成的旋转盘与温度相关的热导率和地热粘度。磁性纳米流体的粘度与深度成正比，与温度成反比。将Navier-Stokes方程与磁化的麦克斯韦方程相结合，通过相似变换得到了常微分方程组。据推测，旋转的磁盘显着提高了径向运动的流量，并观察到其他参数，如可变粘度，磁场参数和雷诺数的损失。此外，显着提高传热的普朗特数，和旋转参数的值越大，描绘了一个较弱的集中现象。此外，努塞尔数随导热系数的变化呈现出下降的趋势。最后，当前的研究结果可以成功填补现有文献中的空白。
The study of fluid flow over a rotating disk is critically significant due to its applications in various industries and engineering and scientific fields. Ferrohydrodynamics of magnetic fluid experience the effects of magnetic fields incorporated with the walls of the rotating disk. The current investigation considers the ferrohydrodynamic flow of magnetic nanofluid caused by a rotating disk with temperature-dependent thermal conductivity and geothermal viscosity. The viscosity of magnetic nanofluid is directly proportional to the linear relation of depth and inversely proportional to temperature. The Navier–Stokes equations with the Maxwell equations of magnetization are modified to govern the fundamental partial differential equations and through transformations of similarity we obtained ordinary differential equations. It is inferred that rotation of the disk significantly boosts the radial movement of flow, and a loss is observed for other parameters such as variable viscosity, magnetic field parameter, and Reynolds number. Moreover, the heat transfer is enhanced considerably for increasing the Prandtl number, and the larger value of the rotation parameter depicts a weaker concentration phenomenon. Also, the Nusselt number show a decline curve for variable thermal conductivity parameter. Finally, the current findings can successfully fill a gap in the existing literature.