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首页> 外文期刊>International Journal of Heat and Mass Transfer >Fully developed flow and heat transfer characteristics in a wavy passage: Effect of amplitude of waviness and Reynolds number
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Fully developed flow and heat transfer characteristics in a wavy passage: Effect of amplitude of waviness and Reynolds number

机译：波浪通道中充分发展的流动和传热特性：波幅和雷诺数的影响

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摘要

The present study deals with numerical simulation of fully developed flow and heat transfer through a wavy surface described by the function y= 2αsin~2(πx/L). Finite volume method on collocated grid is used to solve incompressible, time-dependent Navier-Stokes and energy equation in primitive variable form. Effect of geometry, generated by varying H_(min)/H_(max) ratio from 0.1 to 0.5 and keeping L/a ratio fixed to 8, on fluid flow and heat transfer characteristics has been elaborated at a Reynolds number of 600. The critical Reynolds number of unsteadiness is found to depend on the geometrical parameters. At Re = 600, one model shows the flow with multiple frequencies while the others reveal single frequency. It is established that geometry with H_(min)/H_(mix) ratio 0.2 produces the highest Nusselt number and spawns the best thermal performance factor (TPF). With increase in Reynolds number, the steady flow shows a decrease in TPF while an increase in TPF is noticed when the flow is unsteady.
机译：本研究涉及通过函数y =2αsin〜2（πx/ L）描述的波浪表面充分流动和传热的数值模拟。使用并置网格上的有限体积方法来求解不可压缩的时间相关的Navier-Stokes和原始变量形式的能量方程。在600雷诺数下，已经阐述了通过将H_（min）/ H_（max）比率从0.1更改为0.5并将L / a比率固定为8所产生的几何形状对流体流动和传热特性的影响。发现不稳定的雷诺数取决于几何参数。在Re = 600时，一个模型显示具有多个频率的流量，而其他模型则显示单个频率。已确定H_（min）/ H_（mix）比为0.2的几何形状产生最高的Nusselt数，并产生最佳的热性能因子（TPF）。随着雷诺数的增加，稳定流量显示TPF减小，而当流量不稳定时，注意到TPF增大。

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