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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Exploration of particle shape effect on Cu-H_2O nanoparticles over a moving plate An approach of dual solution
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Exploration of particle shape effect on Cu-H_2O nanoparticles over a moving plate An approach of dual solution

机译：颗粒形状效应对铜颗粒效应在移动板上的粒子形状效应

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摘要

Purpose - This paper aims to explore particle shape effect on Cu-H_2O nanoparticles over a moving plate in the presence of nonlinear thermal radiation. To characterize the effect, particle shape and viscous dissipation are considered. Convergent solutions for the resulting nonlinear systems are derived and the effects of embedded parameters of interest on velocity and temperature field are examined. Design/methodology/approach - The Runge-Kutta-Fehlberg fourth-fifth order method along with shooting technique is used to solve the governing equations (6) and (7) with boundary conditions (8). A suitable finite value of η_∞ is considered in such a way that the boundary conditions are satisfied asymptotically. Findings - The results show an increase in both the heat transfer and thermodynamic performance of the system. However, among the three nanoparticle shapes, disk shape exhibited better heat transfer characteristics and heat transfer rate. On the other hand, the velocity profile enhances with increasing values of Φ in the first solution, but the opposite trend was found in the second solution. Originality/value - The present paper deals with an exploration of particle shape effect on Cu-H_2O nanoparticles over a moving plate in the presence of nonlinear thermal radiation. To characterize the effect, particle shape and viscous dissipation are considered. Convergent solutions for the resulting nonlinear systems are derived and the effects of embedded parameters of interest on velocity and temperature field are examined. The skin friction coefficient and Nusselt number are numerically tabulated and discussed. The results show an increase in both heat transfer and thermodynamic performance of the system. However, among the three nanoparticle shapes, disk shape exhibited better heat-transfer characteristics and heat-transfer rate. On the other hand, the velocity profile enhances with increasing values of Φ in the first solution, but the opposite trend was found in the second solution.
机译：目的 - 本文旨在在非线性热辐射存在下探讨在移动板上的Cu-H_2O纳米颗粒上的粒子形状效应。为了表征效果，考虑颗粒形状和粘性耗散。得到了所得非线性系统的收敛溶液，研究了嵌入参数对速度和温度场的嵌入参数的影响。设计/方法/方法 - Runge-Kutta-Fehlberg第四 - 第五顺序方法以及拍摄技术用于解决与边界条件（8）的控制方程（6）和（7）。 η_1的合适有限值被认为是渐近的边界条件。结果 - 结果显示了系统的传热和热力学性能的增加。然而，在三个纳米颗粒形状中，圆盘形状表现出更好的传热特性和传热速率。另一方面，速度曲线随着第一种解决方案中的φ值增加而增强，但在第二种解决方案中发现了相反的趋势。原创/值 - 本文涉及在非线性热辐射存在下在移动板上的Cu-H_2O纳米颗粒上的粒子形状效应探索。为了表征效果，考虑颗粒形状和粘性耗散。得到了所得非线性系统的收敛溶液，研究了嵌入参数对速度和温度场的嵌入参数的影响。表皮摩擦系数和纽带数在数值上表现出并讨论。结果显示了系统的传热和热力学性能的增加。然而，在三个纳米颗粒形状中，盘形表现出更好的传热特性和传热速率。另一方面，速度曲线随着第一种解决方案中的φ值增加而增强，但在第二种解决方案中发现了相反的趋势。

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