The decay of 16Hz and 32Hz disturbance is weak in the near wall region near the disturbance source while damp tendency is more obvious in the outer region beyond logarithm-law layer, although the decaying tendency becomes more and more slow.
16Hz和32Hz的扰动在距离扰动源较近的近壁区衰减较弱,在对数律区以外的区域引起的衰减相对较强,但沿流向衰减趋势逐渐减弱。
参考来源 - 周期性人工扰动在湍流边界层衰减和演化的实验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
近壁区处理分别采用两层和三层壁面函数。
The three-layer and two-layer wall function were applied to prediction of flow in the near wall region.
在近壁区范围内，采用壁函数技术解决壁面效应问题。
In the areas close to the boundary, the technique of wall function is adopted to solve the effect of the wall surface.
研究了管道中近壁区颗粒的轴向速度、湍流强度和径向速度。
The axial velocity, fluctuation velocity, the turbulence intensity, and transverse velocity of the fine particle were studied.
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