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首页> 外文期刊>Arabian Journal for Science and Engineering >Comparative Analysis Between Three‑Dimensional Flow of Water Conveying Alumina Nanoparticles and Water Conveying Alumina–Iron(Ⅲ) Oxide Nanoparticles in the Presence of Lorentz Force
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Comparative Analysis Between Three‑Dimensional Flow of Water Conveying Alumina Nanoparticles and Water Conveying Alumina–Iron(Ⅲ) Oxide Nanoparticles in the Presence of Lorentz Force

机译：洛仑兹力作用下载水氧化铝纳米粒子与载水氧化铝-氧化铁（Ⅲ）纳米粒子流动的比较分析

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摘要

In the manufacturing companies of the hybrid-powered engine, little is known on the significance of adding iron(Ⅲ) oxidenanoparticles to an existing alumina–water nanofluid in the presence of Lorentz force. This study presents the three-dimensionalflow of water conveying alumina nanoparticles and water conveying alumina/iron(Ⅲ) oxide nanoparticles within thethin boundary layer formed on a bidirectional linearly stretchable surface. The governing equation that models the transportphenomena was non-dimensionalized and parameterized using the suitable similarity variables. The boundary value problemof the corresponding ordinary differential equation was solved numerically. The technique of slope of the linear regressionthrough the data point was adopted to quantify the observed results. The results of this study show that the addition of Fe_3O_4nanoparticles to Al_2O_3–water nanofluid slightly reduces the motion of the flow at all points from the wall to the free stream.However, the temperature distribution across the flow may be improved. The two components of velocity for the motionof both fluids along x-direction and y-direction increase and decreases across the fluid domain, respectively, when Lorentzforce is minimum and maximum due to the significance of stretching rate that is predominant along y-direction. When thestretching rate is small, the maximum velocity along x-direction is ascertained in the flow of nanofluid. Skin friction coefficientsin the flow along both directions decrease with both Lorentz force and stretching rate.
机译：在混合动力发动机的制造公司中，对于在洛伦兹力作用下向现有的氧化铝-水纳米流体中添加铁（Ⅲ）氧化纳米颗粒的重要性了解甚少。这项研究提出了在双向线性可拉伸表面上形成的薄边界层内的水输送氧化铝纳米粒子和水输送氧化铝/氧化铁（Ⅲ）纳米粒子的三维流动。使用适当的相似性变量，对运输现象建模的控制方程未进行尺寸标注和参数化。数值求解了相应的常微分方程的边值问题。通过数据点线性回归的斜率技术对观测结果进行量化。这项研究的结果表明，在Al_2O_3–水纳米流体中添加Fe_3O_4纳米颗粒会稍微降低从壁到自由流的所有点的流动运动。但是，整个流的温度分布可能会得到改善。当Lorentzforce最小和最大时，由于沿y方向占主导的拉伸速率的重要性，两种流体沿x方向和y方向运动的速度的两个分量分别在整个流体域中增大和减小。当拉伸速率较小时，在纳米流体流中确定沿x方向的最大速度。沿两个方向的流动中的皮肤摩擦系数均随着洛伦兹力和拉伸速率而减小。

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