On Turbulent Contribution to Frictional Drag in Wall-Bounded Turbulent Flow
On Turbulent Contribution to Frictional Drag in Wall-Bounded Turbulent Flow
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DOI：
10.1088/0256-307x/23/5/045
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发表时间：
2006-05
影响因子：
3.5
通讯作者：
Li Feng-chen;Y. Kawaguchi;K. Hishida;M. Oshima
中科院分区：
文献类型：
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作者：
Li Feng-chen;Y. Kawaguchi;K. Hishida;M. Oshima
我们基于湍流爆发事件的特征参数，提出了一个简单的模型，用于研究壁面湍流中湍流对摩擦阻力的贡献。实验中通过粒子图像测速研究水和减阻表面活性剂溶液的流动得到了验证。结果表明，湍流对表面摩擦系数的贡献与源自壁面的湍流爆发的空间频率和强度的乘积成线性比例。
We propose a simple model for turbulent contribution to the frictional drag in a wall-bounded turbulent flow based on the characteristic parameters of turbulent bursting events. It is verified on water and drag-reducing surfactant solution flows investigated by particle image velocimetry in experiments. It is obtained that the turbulent contribution to the skin friction factor is linearly proportional to the product of the spatial frequency and strength of turbulent bursts originated from the wall.