Akbar Noreen Sher
DBS&H, CEME, National University of Sciences and Technology, Islamabad, Pakistan.
Front Chem. 2022 Oct 11;10:1021303. doi: 10.3389/fchem.2022.1021303. eCollection 2022.
We analyze the steady laminar incompressible boundary-layer magnetohydrodynamic impacts on the nanofluidic flux over a static and mobile wedge in the existence of an applied magnetic field. The Falkner-Skan wedge flow model is taken into consideration. Reynolds' model is considered to introduce temperature-dependent viscosity. As in real life, most fluids have variable viscosity. The executive partial differential equations are converted into a set-up of ordinary differential equations by means of a similarity conversion. Numerical solutions are computed for the converted set-up of equations subjected to physical boundary conditions. The specific flow dynamics like velocity profile, streamlines, temperature behavior, and coefficient of local skin friction are graphically analyzed through numerical solutions. It is concluded that the laminar boundary-layer separation from the static and moving wedge surface is altered by the applied external electric field, and the wedge (static or moving) angle improves the surface heat flux in addition to the coefficient of skin friction. Furthermore, it is found that the methanol-based nanofluid is a less-efficient cooling agent than the water-based nanofluid; therefore, the magnitude of the Nusselt number is smaller for the water-based nanofluid. It is also observed that the addition of only 1% of these nanoparticles in a base fluid results in an enhancement of almost 200% in the thermal conductivity.
我们分析了在存在外加磁场的情况下，稳定层流不可压缩边界层磁流体动力学对静态和移动楔上纳米流体通量的影响。考虑了福克纳 - 斯坎楔流模型。采用雷诺模型来引入与温度相关的粘度。在现实生活中，大多数流体具有可变粘度。通过相似变换将执行偏微分方程转化为一组常微分方程。针对经过物理边界条件转换后的方程组计算数值解。通过数值解对诸如速度剖面、流线、温度行为和局部表面摩擦系数等特定流动动力学进行图形分析。得出的结论是，外加外部电场改变了从静态和移动楔表面的层流边界层分离，并且楔（静态或移动）角除了表面摩擦系数外还提高了表面热通量。此外，发现基于甲醇的纳米流体作为冷却剂的效率低于基于水的纳米流体；因此，基于水的纳米流体的努塞尔数的量级较小。还观察到，在基础流体中仅添加1%的这些纳米颗粒会导致热导率提高近200%。
