Direct numerical simulation of turbulent channel flows with boundary roughened with virtual sandpaper
Direct numerical simulation of turbulent channel flows with boundary roughened with virtual sandpaper
复制标题
虚拟砂纸粗糙边界湍流通道流的直接数值模拟
DOI：
10.1063/1.2183806
复制
发表时间：
2006
影响因子：
4.6
通讯作者：
A. Scotti
中科院分区：
文献类型：
--
作者：
A. Scotti
介绍了一种模拟粗糙表面对湍流边界层影响的方法。该方法易于实现，不增加代码的数值开销，并且以先验可预测的方式影响平均速度。单个参数k就足以完全表征粗糙度。该方法已在Reτ=1000时的槽道湍流中进行了试验，其中粗糙度高度k+横跨过渡区域。粗糙流的特性与实验结果吻合较好。
A method to simulate the effects of a roughened surface on a turbulent boundary layer is introduced. The method is easy to implement, does not increase the numerical overhead of the code, and affects the mean velocity in an a priori predictable way. A single parameter k is sufficient to fully characterize the roughness. The procedure has been tested in turbulent channel flows at Reτ=1000, with roughness heights k+ spanning the transitional regime. The properties of the rough flow agree well with experimental data.