论文标题
在过渡雷诺数时，对侧壁对湍流的侧壁影响的数值研究
A numerical study of the side-wall effects on turbulent bands in channel flow at transitional Reynolds numbers
论文作者
论文摘要
我们使用开源频谱元素代码nektar ++研究了过渡雷诺数在过渡雷诺数下通道流中湍流带的侧壁影响。本研究考虑了50：1的宽度纵横比为50：1。我们的研究表明，湍流带可以与侧壁上方的RENOLD高于1000左右的侧壁碰撞，但在975左右的RE衰减左右，即临界雷诺数的数量应大约在两个雷诺数之间。我们还讨论了在低雷诺数下的带状衰减的基本机制以及比我们研究中所考虑的较大的跨度通道宽度的潜在影响。对于过渡性雷诺数数量的通道流动湍流的实验研究，结果是有益的。
We investigated the side-wall effects on turbulent bands in channel flow at transitional Reynolds numbers by direct numerical simulations using the open source spectral-element code Nektar++. The width-to-height aspect ratio of 50:1 is considered for this study. Our study shows that turbulent bands can survive the collision with the side wall above bulk Reynolds number of Re around 1000 but decay below Re around 975, i.e. the critical Reynolds number should be approximately between the two Reynolds numbers. We also discussed about the underlying mechanism for the decay of the band at low Reynolds numbers and potential effects of larger spanwise channel widths than that considered in our study. The results are informative for experimental studies of channel flow turbulence at transitional Reynolds numbers.
