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首页> 外文期刊>Computer Methods and Programs in Biomedicine: An International Journal Devoted to the Development, Implementation and Exchange of Computing Methodology and Software Systems in Biomedical Research and Medical Practice >Stagnation point flow of radiative Oldroyd-B nanofluid over a rotating disk
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Stagnation point flow of radiative Oldroyd-B nanofluid over a rotating disk

机译：旋转磁盘上辐射oldroyd-B纳米流体的停滞点流动

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摘要

Background: Nanofluids are known for better heat transfer characteristics in many heat exchanger devices due to their enhanced heat transfer abilities. Recently, scientists give the idea of nanofluid which is the mixture of base fluid and solid nanoparticles having very small size. For physical phenomenon of conventional fluids by mean of suspensions of nanoparticles in base fluids and prompted produce a new composite known as "nanofluids". These composite contain the nanoparticles with 1-100 nm sized which are suspended in the base fluids. Here we have considered a subclass of non-Newtonian fluid called Oldroyd-B fluid. The fluid motion over the disk surface is produced due to the rotation as well as radially stretching of disk. Further, the impact of non-linear thermal radiation and heat generation/absorption is introduced to visualize the heat transfer behavior. The convective boundary is also taken into consideration in order to investigate the fluid thermal characteristics. The novel features of thermophoresis and Brownian motion during the nanoparticles movement in fluid motion are studied with revised Buongiorno model. The physical problem is modeled with the concept of classical Fourier's and Fick's laws. The von Karman variables are used to convert the partial differential equations (PDEs) into non-dimensional ordinary differential equations (ODEs).
机译：背景：由于其增强的传热能力，已知纳米流体以多种热交换器装置中的更好的传热特性。最近，科学家们介绍了纳米流体的想法，该纳米流体是基础流体和固体纳米颗粒的混合物具有非常小的尺寸。通过基础流体中的纳米颗粒的悬浮液的平均值的常规流体的物理现象，并促使称为称为“纳米流体”的新复合物。这些复合材料含有1-100nm尺寸的纳米颗粒，其悬浮在基础液中。在这里，我们考虑了叫做oldroyd-B流体的非牛顿液体的子类。由于旋转以及圆盘的径向拉伸，产生盘表面上的流体运动。此外，引入了非线性热辐射和发热/吸收的影响以使传热行为可视化。还考虑了对流边界，以研究流体热特性。研究了在流体运动中纳米粒子运动中的热孔化和褐色运动的新特征，并进行了修正的Buongiorno模型。物理问题是用古典傅里叶和Fick的法律的概念建模的。 Von Karman变量用于将部分微分方程（PDE）转换为非维常微分方程（ODES）。

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