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Heat transfer in steady slip flow of tangent hyperbolic fluid over the lubricated surface of a stretchable rotatory disk
Case Studies in Thermal Engineering ( IF 6.4 ) Pub Date : 2020-12-28 , DOI: 10.1016/j.csite.2020.100825
Usman , Waqar Khan , Irfan Anjum Badruddin , Abuzar Ghaffari , Hafiz Muhammad Ali

The heat transfer phenomenon is beneficial and applicable in engineering, industries, and technological processes. The production of energy with the help of some cheap resources plays a pivotal and renewable role in the industrial development of the countries. Owing to such a significant performance of heat transfer, the steady slip flow and heat transfer of tangent hyperbolic fluid over a lubricating surface of the stretchable rotatory disk is investigated. The effects of MHD, nonlinear radiation, and non-uniform heat source/sink subject to nonlinear boundary conditions are included in motion and energy equations. Because of the lubrication, a thin layer of the power-law fluid is produced at the surface of the disk. Since the lubricating layer is thin, the interfacial conditions are applied at the surface between the fluid and lubricant. The governing nonlinear partial differential equations (PDEs) have been converted into ordinary differential equations (ODEs), which are solved numerically using the Keller-box method. The upshots of pertinent parameters upon the dimensionless distributions of velocity and temperature are deliberated. The surface drag forces and heat transfer rates are computed, and the effects of governing parameters on them are examined. With the enhancement in the slip at the interface and Weissenberg number, the radial and azimuthal velocities enhances close to the disk, whereas they observe two diverse trends for the power-law index. Also, temperature escalates for radiation parameter, and this escalation is prominent for nonlinear radiation.



中文翻译:

切线双曲线流体在可拉伸旋转盘的润滑表面上的稳定滑移流中的热传递

传热现象是有益的,可应用于工程,工业和技术过程。在一些廉价资源的帮助下生产能源在这些国家的工业发展中起着举足轻重的作用。由于这种显着的热传递性能,研究了可伸展双曲线流体在可拉伸转盘的润滑表面上的稳定滑动流和正切双曲线流体的热传递。运动和能量方程中包括MHD,非线性辐射以及受非线性边界条件影响的非均匀热源/散热器的影响。由于润滑,在磁盘的表面上会产生一层薄的幂律流体。由于润滑层很薄,因此在流体和润滑剂之间的表面施加了界面条件。已将控制非线性偏微分方程(PDE)转换为常微分方程(ODE),然后使用Keller-box方法对其进行数值求解。讨论了有关速度和温度的无量纲分布的相关参数的结果。计算表面阻力和传热速率,并检查控制参数对其的影响。随着界面滑移和Weissenberg数的增加,径向和方位角速度在圆盘附近增强,而它们观察到幂律指数有两种不同的趋势。而且,温度会随着辐射参数的升高而升高,而这种升高对于非线性辐射而言尤为突出。使用凯勒盒方法数值求解。讨论了有关速度和温度的无量纲分布的相关参数的结果。计算表面阻力和传热速率,并检查控制参数对它们的影响。随着界面滑移和Weissenberg数的增加,径向和方位角速度在圆盘附近增强,而它们观察到幂律指数有两种不同的趋势。而且,温度会随着辐射参数的升高而升高,而这种升高对于非线性辐射而言尤为突出。使用凯勒盒方法数值求解。讨论了有关速度和温度的无量纲分布的相关参数的结果。计算表面阻力和传热速率,并检查控制参数对它们的影响。随着界面滑移和Weissenberg数的增加,径向和方位角速度在圆盘附近增强,而它们观察到幂律指数有两种不同的趋势。而且,温度会随着辐射参数的升高而升高,而这种升高对于非线性辐射而言尤为突出。并检查了控制参数对其的影响。随着界面滑移和Weissenberg数的增加,径向和方位角速度在圆盘附近增强,而它们观察到幂律指数有两种不同的趋势。而且,温度会随着辐射参数的升高而升高,而这种升高对于非线性辐射而言尤为突出。并检查了控制参数对其的影响。随着界面滑移和Weissenberg数的增加,径向和方位角速度在圆盘附近增强,而它们观察到幂律指数有两种不同的趋势。而且,温度会随着辐射参数的升高而升高,而这种升高对于非线性辐射而言尤为突出。

更新日期:2020-12-28
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